ASP.Net Interview Questions Volume II
What
is Shared (static) member?
What
is the transport protocol you use to call a Web service?
What is Option
Strict used for?
Define
Boxing an Unboxing.
Define
ViewState in ASP.NET.
What
is the lifespan for items stored in ViewState?
Define
EnableViewState property.
What are
Delegates?
What
are Classes?
What is Encapsulation?
Different
types of Session state management options available with ASP.NET?
Explain
ADO.NET.
Define
Server-side and Client-side code in ASP.NET.
What
tag do you use to add a hyperlink column to the DataGrid?
Where does VS.NET store
Web application projects?
Steps to execute a stored procedure from Web Application.
What
are the exception-handling ways in ASP.NET?
Describe
use of error pages in ASP.NET.
Explain
tracing in ASP.NET.
What
is the use of ComVisible attribute?
Define
Windows and Forms authentication.
What is Secure Sockets
Layer (SSL) security?
Why
is the Machine.config file?
Explain how to
distribute shared components as part of an installation program
Define
Unit testing, Integration testing, Regression testing.
Define HTML and XML.
Nice interview questions found in a
Job Posting
|
||||||||||||||
|
ASP.NET interview questions
What is Absolute and Sliding expiration? You specify the duration of the cache using Absolute Expiration, starting from the time the cache is activated. Can you explain benefits and limitations of using Hidden frames? Benefits of hidden frames: Using hidden frames you can cache more than one data field. The ability to cache and access data items stored in different hidden forms. Limitations of hidden frames They are not supported on all browsers. The data can be tampered. Nidhi 11-12-2011 09:02 AM |
||||||||||||||
|
ASP.NET interview questions
Explain the advantages and disadvantages of using Cookies. Advantages of cookies Since stored in client no server resources are required. cookies are light weight and simple to use Disadvantages of using cookies Most browsers place a limit on the size of a cookie. Use of cookies are inaffective when browser or client device’s ability to receive cookies are disabled. Cookies can be tampered. Cookies can expire thus leading to inconsistency. Nidhi 11-12-2011 09:01 AM |
||||||||||||||
|
ASP.NET interview
questions
Benefits and Limitation of using Hidden fields. Benefits of Hidden fields Hidden fields are simple and easy to implement. Hidden fields work with Web Farms as data is cached on client side Good news is that all browsers support hidden field. And yet another advantage is that no server resources are required for Hidden fields usage Limitations of Hidden field One of the biggest threat of using Hidden fields are that they can be tampered creating a security hole. Page performance adversely affected if you store large data since the data are stored in pages itself. They do not support rich structures as HTML hidden fields are only single valued. |
|
1. What does the Orientation property do in a Menu control?
Orientation property
of the Menu control sets the display of menu on a Web page to vertical or
horizontal.
Originally the orientation is set to vertical.
2. Differentiate between:
a.)Client-side and server-side validations in Web pages.
- Client-side
validations happends at the client's side with the help of JavaScript and
VBScript. This happens before the Web page is sent to the server.
- Server-side validations occurs place at the server side.
b.)Authentication and authorization.
- Authentication is
the process of verifyng the identity of a user using some credentials like
username and password while authorization determines the parts of the system
to which a particular identity has access.
- Authentication is required before authorization. For e.g. If an employee authenticates himself with his credentials on a system, authorization will determine if he has the control over just publishing the content or also editing it. |
3.a.) What does the .WebPart file do?
It explains the settings
of a Web Parts control that can be included to a specified zone on a Web page.
b.) How would you enable impersonation in the web.config file?
In order to enable the
impersonation in the web.confing file, take the following steps:
- Include the <identity> element in the web.config file.
- Set the impersonate attribute to true as shown below:
<identity impersonate = "true" />
- Include the <identity> element in the web.config file.
- Set the impersonate attribute to true as shown below:
<identity impersonate = "true" />
4. a.) Differentiate between
a.)File-based dependency and key-based dependency.
- In file-based
dependency, the dependency is on a file saved in a disk while in key-based
dependency, you depend on another cached item.
b.) Globalization and localization.
- Globalization is a
technique to identify the part of a Web application that is different for
different languages and separate it out from the web application while in
localization you try to configure a Web application so that it can be supported
for a specific language or locale.
5. a.)Differentiate between a page theme and a global theme?
- Page theme applies to
a particular web pages of the project. It is stored inside a subfolder of the
App_Themes folder.
- Global theme applies to all the web applications on the web server. It is stored inside the Themes folder on a Web server.
- Global theme applies to all the web applications on the web server. It is stored inside the Themes folder on a Web server.
b.)What are Web server controls in ASP.NET?
- These are the objects
on ASP.NET pages that run when the Web page is requested.
- Some of these Web server controls, like button and text box, are similar to the HTML controls.
- Some controls exhibit complex behavior like the controls used to connect to data sources and display data.
- Some of these Web server controls, like button and text box, are similar to the HTML controls.
- Some controls exhibit complex behavior like the controls used to connect to data sources and display data.
6. a.) Differentiate between a HyperLink control and a
LinkButton control.
- A HyperLink control
does not have the Click and Command events while the LinkButton control has
them, which can be handled in the code-behind file of the Web page.
b.) How do Cookies work? Give an example of their abuse.
- The server directs the
browser to put some files in a cookie. All the cookies are then sent for the
domain in each request.
- An example of cookie abuse could be a case where a large cookie is stored affecting the network traffic.
- An example of cookie abuse could be a case where a large cookie is stored affecting the network traffic.
7. a.) What are Custom User Controls in ASP.NET?
- These are the controls
defined by developers and work similart to other web server controls.
- They are a mixture of custom behavior and predefined behavior.
- They are a mixture of custom behavior and predefined behavior.
b.) What is Role-based security?
- Used in almost all
organization, the Role-based security assign certain privileges to each role.
- Each user is assigned a particular role from the list.
- Privileges as per role restrict the user's actions on the system and ensure that a user is able to do only what he is permitted to do on the system.
- Each user is assigned a particular role from the list.
- Privileges as per role restrict the user's actions on the system and ensure that a user is able to do only what he is permitted to do on the system.
8. What are the HTML server controls in ASP.NET?
- HTML server controls
are similar to the standard HTML elements like those used in HTML pages.
- They expose properties and events for programatical use.
- To make these controls programmatically accessible, we specify that the HTML controls act as a server control by adding the runat="server" attribute.
- They expose properties and events for programatical use.
- To make these controls programmatically accessible, we specify that the HTML controls act as a server control by adding the runat="server" attribute.
9. a.) What are the various types of Cookies in ASP.NET?
There exist two types of
cookies in ASP.NET
- Session Cookie - It resides on the machine of the client for a single session and works until the user logs out of the session.
- Persistent Cookie - It resides on the machine of a user for a specified period. This period can be set up manually by the user.
- Session Cookie - It resides on the machine of the client for a single session and works until the user logs out of the session.
- Persistent Cookie - It resides on the machine of a user for a specified period. This period can be set up manually by the user.
b.) How would you turn off cookies on one page of your website?
- This can be done by
using the Cookie.Discard property.
- It Gets or sets the discard flag set by the server.
- When set to true, this property instructs the client application not to save the Cookie on the hard disk of the user at the end of the session.
- It Gets or sets the discard flag set by the server.
- When set to true, this property instructs the client application not to save the Cookie on the hard disk of the user at the end of the session.
c.) How would you create a permanent cookie?
- Permanent cookies are
stored on the hard disk and are available until a specified expiration date is
reached.
- To create a cookie that never expires set its Expires property equal to DateTime.maxValue.
- To create a cookie that never expires set its Expires property equal to DateTime.maxValue.
10. a.) Explain Culture and UICulture values.
- Culture value
determines the functions like Date and Currency used to format data and numbers
in a Web page.
- UICulture value determines the resources like strings or images loaded in a Web application for a Web page.
- UICulture value determines the resources like strings or images loaded in a Web application for a Web page.
b.) What is Global.asax file used for?
It executes
application-level events and sets application-level variables.
11. a.) Explain ASP.NET Web Forms.
- Web Forms are an
extremely important part of ASP.NET.
- They are the User Interface (UI) elements which provide the desired look and feel to your web applications.
- Web Forms provide properties, methods, and events for the controls that are placed onto them.
- They are the User Interface (UI) elements which provide the desired look and feel to your web applications.
- Web Forms provide properties, methods, and events for the controls that are placed onto them.
b.) What is event bubbling?
- When child control
send events to parent it is termed as event bubbling.
- Server controls like Data grid, Data List, and Repeater can have other child controls inside them.
- Server controls like Data grid, Data List, and Repeater can have other child controls inside them.
12. What are the various types of validation controls provided
by ASP.NET?
ASP.NET provides 6 types
of validation controls as listed below:
i.) RequiredFieldValidator - It is used when you do not want the container to be empty. It checks if the control has any value or not.
ii.) RangeValidator - It checks if the value in validated control is within the specified range or not.
iii.) CompareValidator - Checks if the value in controls matches some specific values or not.
iv.) RegularExpressionValidator - Checks if the value matches a specific regular expression or not.
v.) CustomValidator - Used to define User Defined validation.
vi.) Validation Summary -Displays summary of all current validation errors on an ASP.NET page.
i.) RequiredFieldValidator - It is used when you do not want the container to be empty. It checks if the control has any value or not.
ii.) RangeValidator - It checks if the value in validated control is within the specified range or not.
iii.) CompareValidator - Checks if the value in controls matches some specific values or not.
iv.) RegularExpressionValidator - Checks if the value matches a specific regular expression or not.
v.) CustomValidator - Used to define User Defined validation.
vi.) Validation Summary -Displays summary of all current validation errors on an ASP.NET page.
13. Differentiate between:
a.) Namespace and Assembly.
- Namespace is a naming
convenience for logical design-time while an assembly establishes the name
scope for types at run time.
b.) Early binding and late binding.
Early binding means
calling a non-virtual method that is decided at a compile time while Late
binding refers to calling a virtual method that is decided at a runtime.
14. What are the different kinds of assemblies?
There can be two types
of assemblies.
i.) Static assemblies -
- They are stored on disk in portable executable files.
- It includes .NET Framework types like interfaces and classes, resources for the assembly (bitmaps, JPEG files, resource files etc.).
ii.) Dynamic assemblies -
- They are not saved on disk before execution rather they run directly from memory.
- They can be saved to disk after they have been executed.
i.) Static assemblies -
- They are stored on disk in portable executable files.
- It includes .NET Framework types like interfaces and classes, resources for the assembly (bitmaps, JPEG files, resource files etc.).
ii.) Dynamic assemblies -
- They are not saved on disk before execution rather they run directly from memory.
- They can be saved to disk after they have been executed.
15. Differentiate between Structure and Class.
- Structures are value
type while Classes are reference type.
- Structures can not have constructor or destructors while Classes can have them.
- Structures do not support Inheritance while Classes do support Inheritance.
- Structures can not have constructor or destructors while Classes can have them.
- Structures do not support Inheritance while Classes do support Inheritance.
16. Explain ViewState.
- It is a .Net mechanism
to store the posted data among post backs.
- It allows the state of objects to be stored in a hidden field on the page, saved on client side and transported back to server whenever required.
- It allows the state of objects to be stored in a hidden field on the page, saved on client side and transported back to server whenever required.
17. What are the various types of Authentication?
There are 3 types of
Authentication namely Windows, Forms and Passport Authentication.
- Windows authentication - It uses the security features integrated in Windows NT and Windows XP OS to authenticate and authorize Web application users.
- Forms authentication - It allows you to create your own list of users and validate their identity when they visit the Web site.
- Passport authentication - It uses the Microsoft centralized authentication provider to identify users. Passport allows users to use a single identity across multiple Web applications. Passport SDK needs to be installed to use Passport authentication in your Web application.
- Windows authentication - It uses the security features integrated in Windows NT and Windows XP OS to authenticate and authorize Web application users.
- Forms authentication - It allows you to create your own list of users and validate their identity when they visit the Web site.
- Passport authentication - It uses the Microsoft centralized authentication provider to identify users. Passport allows users to use a single identity across multiple Web applications. Passport SDK needs to be installed to use Passport authentication in your Web application.
18. Explain Server-side scripting and Client-side scripting.
- Server side scripting
- All the script are executed by the server and interpreted as needed.
- Client side scripting means that the script will be executed immediately in the browser such as form field validation, email validation, etc. It is usaullay carrried out in VBScript or JavaScript.
- Client side scripting means that the script will be executed immediately in the browser such as form field validation, email validation, etc. It is usaullay carrried out in VBScript or JavaScript.
19. a.) What is garbage collection?
It is a system where a
run-time component takes responsibility for managing the lifetime of objects
and the heap memory that they occupy.
b.) Explain serialization and deserialization.
- Serialization is the
process of converting an object into a stream of bytes.
- Deserialization is the process of creating an object from a stream of bytes.
Both these processes are usually used to transport objects.
- Deserialization is the process of creating an object from a stream of bytes.
Both these processes are usually used to transport objects.
20. What are the various session state management options
provided by ASP.NET?
- ASP.NET provides two
session state management options - In-Process and Out-of-Process state
management.
- In-Process stores the session in memory on the web server.
- Out-of-Process stores data in an external data source. This data source may be a SQL Server or a State Server service. Out-of-Process state management needs all objects stored in session to be serializable.
- In-Process stores the session in memory on the web server.
- Out-of-Process stores data in an external data source. This data source may be a SQL Server or a State Server service. Out-of-Process state management needs all objects stored in session to be serializable.
ASP.NET interview questions - Jan 04, 2011 at 05:16 PM by Rahul
Describe how Passport authentication works.
ASP.NET application with
Passport authentication implemented checks the user’s machine for a current
passport authentication cookie. If it is not available, ASP.NET directs the
user to a Passport sign-on page. The Passport service authenticates the user,
stores an authentication cookie on the user’s computer and direct the user to
the requested page.
Explain the steps to be followed to use Passport authentication.
1. Install the Passport
SDK.
2. Set the application’s authentication mode to Passport in Web.config.
3. Set authorization to deny unauthenticated users.
3. Use the PassportAuthentication_OnAuthenticate event to access the user’s Passport profile to identify and authorize the user.
4. Implement a sign-out procedure to remove Passport cookies from the user’s machine.
2. Set the application’s authentication mode to Passport in Web.config.
3. Set authorization to deny unauthenticated users.
3. Use the PassportAuthentication_OnAuthenticate event to access the user’s Passport profile to identify and authorize the user.
4. Implement a sign-out procedure to remove Passport cookies from the user’s machine.
Explain the advantages of Passport authentication.
User doesn’t have to remember
separate user names and passwords for various Web sites
User can maintain his or her profile information in a single location.
Passport authentication also avail access to various Microsoft services, such as Passport Express Purchase.
User can maintain his or her profile information in a single location.
Passport authentication also avail access to various Microsoft services, such as Passport Express Purchase.
What is caching?
Caching is the technique
of storing frequently used items in memory so that they can be accessed more
quickly.
By caching the response, the request is served from the response already stored in memory.
It’s important to choose the items to cache wisely as Caching incurs overhead.
A Web form that is frequently used and does not contain data that frequently changes is good for caching.
A cached web form freezes form’s server-side content and changes to that content do not appear until the cache is refreshed.
By caching the response, the request is served from the response already stored in memory.
It’s important to choose the items to cache wisely as Caching incurs overhead.
A Web form that is frequently used and does not contain data that frequently changes is good for caching.
A cached web form freezes form’s server-side content and changes to that content do not appear until the cache is refreshed.
Explain the use of duration attribute of @OutputCache page
directive.
The @OutputCache
directive’s Duration attribute determines how long the page is cached.
If the duration attribute is set to 60 seconds, the Web form is cached for 60 seconds; the server loads the response in memory and retains that response for 60 seconds.
Any requests during that time receive the cached response.
Once the cache duration has expired, the next request generates a new response and cached for another 60 seconds.
If the duration attribute is set to 60 seconds, the Web form is cached for 60 seconds; the server loads the response in memory and retains that response for 60 seconds.
Any requests during that time receive the cached response.
Once the cache duration has expired, the next request generates a new response and cached for another 60 seconds.
ASP.NET interview test - (20 questions) new
ASP.NET interview test for experienced - (19 questions)
Sql Server (25 questions)
ASP.NET interview test for experienced - (19 questions)
Sql Server (25 questions)
1. Explain how a web application works.
Answer:
A web application resides in the server and serves the client's requests over internet. The client access the web page using browser from his machine. When a client makes a request, it receives the result in the form of HTML which are interpreted and displayed by the browser.
A web application on the server side runs under the management of Microsoft Internet Information Services (IIS). IIS passes the request received from client to the application. The application returns the requested result in the form of HTML to IIS, which in turn, sends the result to the client.
A web application resides in the server and serves the client's requests over internet. The client access the web page using browser from his machine. When a client makes a request, it receives the result in the form of HTML which are interpreted and displayed by the browser.
A web application on the server side runs under the management of Microsoft Internet Information Services (IIS). IIS passes the request received from client to the application. The application returns the requested result in the form of HTML to IIS, which in turn, sends the result to the client.
2. Explain the advantages of ASP.NET.
Answer:
Following are the
advantages of ASP.NET.
Web application exists in compiled form on the server so the execution speed is faster as compared to the interpreted scripts.
ASP.NET makes development simpler and easier to maintain with an event-driven, server-side programming model.
Being part of .Framework, it has access to all the features of .Net Framework.
Content and program logic are separated which reduces the inconveniences of program maintenance.
ASP.NET makes for easy deployment. There is no need to register components because the configuration information is built-in.
To develop program logic, a developer can choose to write their code in more than 25 .Net languages including VB.Net, C#, JScript.Net etc.
Introduction of view state helps in maintaining state of the controls automatically between the postbacks events.
ASP.NET offers built-in security features through windows authentication or other authentication methods.
Integrated with ADO.NET.
Built-in caching features.
Web application exists in compiled form on the server so the execution speed is faster as compared to the interpreted scripts.
ASP.NET makes development simpler and easier to maintain with an event-driven, server-side programming model.
Being part of .Framework, it has access to all the features of .Net Framework.
Content and program logic are separated which reduces the inconveniences of program maintenance.
ASP.NET makes for easy deployment. There is no need to register components because the configuration information is built-in.
To develop program logic, a developer can choose to write their code in more than 25 .Net languages including VB.Net, C#, JScript.Net etc.
Introduction of view state helps in maintaining state of the controls automatically between the postbacks events.
ASP.NET offers built-in security features through windows authentication or other authentication methods.
Integrated with ADO.NET.
Built-in caching features.
3. Explain the different parts that constitute ASP.NET
application.
Answer:
Content, program logic
and configuration file constitute an ASP.NET application.
Content files
Content files include static text, images and can include elements from database.
Program logic
Program logic files exist as DLL file on the server that responds to the user actions.
Configuration file
Configuration file offers various settings that determine how the application runs on the server.
Content files
Content files include static text, images and can include elements from database.
Program logic
Program logic files exist as DLL file on the server that responds to the user actions.
Configuration file
Configuration file offers various settings that determine how the application runs on the server.
4. Describe the sequence of action takes place on the server
when ASP.NET application starts first time
Answer:
Following are the
sequences:
IIS starts ASP.NET worker process - worker process loads assembly in the memory - IIS sends the request to the assembly - the assembly composes a response using program logic - IIS returns the response to the user in the form of HTML.
IIS starts ASP.NET worker process - worker process loads assembly in the memory - IIS sends the request to the assembly - the assembly composes a response using program logic - IIS returns the response to the user in the form of HTML.
5. Explain the components of web form in ASP.NET
Answer:
Server controls
The server controls are Hypertext Markup Language (HTML) elements that include a runat=server attribute. They provide automatic state management and server-side events and respond to the user events by executing event handler on the server.
HTML controls
These controls also respond to the user events but the events processing happen on the client machine.
Data controls
Data controls allow to connect to the database, execute command and retrieve data from database.
System components
System components provide access to system-level events that occur on the server.
The server controls are Hypertext Markup Language (HTML) elements that include a runat=server attribute. They provide automatic state management and server-side events and respond to the user events by executing event handler on the server.
HTML controls
These controls also respond to the user events but the events processing happen on the client machine.
Data controls
Data controls allow to connect to the database, execute command and retrieve data from database.
System components
System components provide access to system-level events that occur on the server.
6. Describe in brief .NET Framework and its components.
Answer:
.NET Framework provides
platform for developing windows and web software. ASP.NET is a part of .Net
framework and can access all features implemented within it that was formerly
available only through windows API. .NET Framework sits in between our
application programs and operating system.
The .Net Framework has two main components:
.Net Framework Class Library: It provides common types such as data types and object types that can be shared by all .Net compliant language.
The Common language Runtime: It provides services like type safety, security, code execution, thread management, interoperability services.
The .Net Framework has two main components:
.Net Framework Class Library: It provides common types such as data types and object types that can be shared by all .Net compliant language.
The Common language Runtime: It provides services like type safety, security, code execution, thread management, interoperability services.
7. What is an Assembly? Explain its parts
Answer:
An assembly exists as a
.DLL or .EXE that contains MSIL code that is executed by CLR. An assembly
contains interface and classes, it can also contain other resources like
bitmaps, files etc. It carries version details which are used by the CLR during
execution. Two assemblies of the same name but with different versions can run
side-by-side enabling applications that depend on a specific version to use
assembly of that version. An assembly is the unit on which permissions are
granted. It can be private or global. A private assembly is used only by the
application to which it belongs, but the global assembly can be used by any
application in the system.
The four parts of an assembly are:
Assembly Manifest - It contains name, version, culture, and information about referenced assemblies.
Type metadata - It contains information about types defined in the assembly.
MSIL - MSIL code.
Resources - Files such as BMP or JPG file or any other files required by application.
The four parts of an assembly are:
Assembly Manifest - It contains name, version, culture, and information about referenced assemblies.
Type metadata - It contains information about types defined in the assembly.
MSIL - MSIL code.
Resources - Files such as BMP or JPG file or any other files required by application.
8. Define Common Type System.
Answer:
.Net allows developers
to write program logic in at least 25 languages. The classes written in one
language can be used by other languages in .Net. This service of .Net is
possible through CTS which ensure the rules related to data types that all
language must follow. It provides set of types that are used by all .NET
languages and ensures .NET language type compatibility.
9. Define Virtual folder.
Answer:
It is the folder that
contains web applications. The folder that has been published as virtual folder
by IIS can only contain web applications.
10. Describe the Events in the Life Cycle of a Web Application
Answer:
A web application starts
when a browser requests a page of the application first time. The request is
received by the IIS which then starts ASP.NET worker process (aspnet_wp.exe).
The worker process then allocates a process space to the assembly and loads it.
An application_start event occurs followed by Session_start. The request is
then processed by the ASP.NET engine and sends back response in the form of
HTML. The user receives the response in the form of page.
The page can be submitted to the server for further processing. The page submitting triggers postback event that causes the browser to send the page data, also called as view state to the server. When server receives view state, it creates new instance of the web form. The data is then restored from the view state to the control of the web form in Page_Init event.
The data in the control is then available in the Page_load event of the web form. The cached event is then handled and finally the event that caused the postback is processed. The web form is then destroyed. When the user stops using the application, Session_end event occurs and session ends. The default session time is 20 minutes. The application ends when no user accessing the application and this triggers Application_End event. Finally all the resources of the application are reclaimed by the Garbage collector.
The page can be submitted to the server for further processing. The page submitting triggers postback event that causes the browser to send the page data, also called as view state to the server. When server receives view state, it creates new instance of the web form. The data is then restored from the view state to the control of the web form in Page_Init event.
The data in the control is then available in the Page_load event of the web form. The cached event is then handled and finally the event that caused the postback is processed. The web form is then destroyed. When the user stops using the application, Session_end event occurs and session ends. The default session time is 20 minutes. The application ends when no user accessing the application and this triggers Application_End event. Finally all the resources of the application are reclaimed by the Garbage collector.
11. What are the ways of preserving data on a Web Form in
ASP.NET?
Answer:
ASP.NET has introduced view state to preserve data between postback events. View state can't avail data to other web form in an application. To provide data to other forms, you need to save data in a state variable in the application or session objects.
ASP.NET has introduced view state to preserve data between postback events. View state can't avail data to other web form in an application. To provide data to other forms, you need to save data in a state variable in the application or session objects.
12. Define application state variable and session state
variable.
Answer:
These objects provide
two levels of scope:
Application State
Data stored in the application object can be shared by all the sessions of the application. Application object stores data in the key value pair.
Session State
Session State stores session-specific information and the information is visible within the session only. ASP.NET creates unique sessionId for each session of the application. SessionIDs are maintained either by an HTTP cookie or a modified URL, as set in the application’s configuration settings. By default, SessionID values are stored in a cookie.
Application State
Data stored in the application object can be shared by all the sessions of the application. Application object stores data in the key value pair.
Session State
Session State stores session-specific information and the information is visible within the session only. ASP.NET creates unique sessionId for each session of the application. SessionIDs are maintained either by an HTTP cookie or a modified URL, as set in the application’s configuration settings. By default, SessionID values are stored in a cookie.
13. Describe the application event handlers in ASP.NET
Answer:
Following are the
application event handlers:
Application_Start: This event occurs when the first user visits a page of the application.
Application_End: This event occurs when there are no more users of the application.
Application_BeginRequest: This occurs at the beginning of each request to the server.
Application_EndRequest: occurs at the end of each request to the server.
Session_Start: This event occurs every time when any new user visits.
Session_End: occurs when the users stop requesting pages and their session times out.
Application_Start: This event occurs when the first user visits a page of the application.
Application_End: This event occurs when there are no more users of the application.
Application_BeginRequest: This occurs at the beginning of each request to the server.
Application_EndRequest: occurs at the end of each request to the server.
Session_Start: This event occurs every time when any new user visits.
Session_End: occurs when the users stop requesting pages and their session times out.
14. What are the Web Form Events available in ASP.NET?
Answer:
Page_Init
Page_Load
Page_PreRender
Page_Unload
Page_Disposed
Page_Error
Page_AbortTransaction
Page_CommitTransaction
Page_DataBinding
Page_Load
Page_PreRender
Page_Unload
Page_Disposed
Page_Error
Page_AbortTransaction
Page_CommitTransaction
Page_DataBinding
15. Describe the Server Control Events of ASP.NET.
Answer:
ASP.NET offers many server controls like button, textbox, DropDownList etc. Each control can respond to the user's actions using events and event handler mechanism.
There are three types of server control events:
Postback events
This events sends the web page to the server for processing. Web page sends data back to the same page on the server.
Cached events
These events are processed when a postback event occurs.
Validation events
These events occur just before a page is posted back to the server.
ASP.NET offers many server controls like button, textbox, DropDownList etc. Each control can respond to the user's actions using events and event handler mechanism.
There are three types of server control events:
Postback events
This events sends the web page to the server for processing. Web page sends data back to the same page on the server.
Cached events
These events are processed when a postback event occurs.
Validation events
These events occur just before a page is posted back to the server.
16. How do you change the session time-out value?
Answer:
The session time-out
value is specified in the web.config file within sessionstate element. You can
change the session time-out setting by changing value of timeout attribute of
sessionstate element in web.config file.
17. Describe how ASP.NET maintains process isolation for each
Web application
Answer:
In ASP.NET, when IIS
receives a request, IIS uses aspnet_isapi.dll to call the ASP.NET worker
process (aspnet_wp.exe). The ASP.NET worker process loads the Web application's
assembly, allocating one process space, called the application domain, for each
application. This is the how ASP.NET maintains process isolation for each Web
application.
18. Define namespace.
Answer:
Namespaces are the way
to organize programming code. It removes the chances of name conflict. It is
quite possible to have one name for an item accidentally in large projects
those results into conflict. By organizing your code into namespaces, you
reduce the chance of these conflicts. You can create namespaces by enclosing a
class in a Namespace...End Namespace block.
You can use namespaces outside your project by referring them using References dialog box. You can use Imports or using statement to the code file to access members of the namespaces in code.
You can use namespaces outside your project by referring them using References dialog box. You can use Imports or using statement to the code file to access members of the namespaces in code.
19. What are the options in ASP.NET to maintain state?
Answer:
Client-side state management
This maintains information on the client’s machine using Cookies, View State, and Query Strings.
Cookies
A cookie is a small text file on the client machine either in the client’s file system or memory of client browser session. Cookies are not good for sensitive data. Moreover, Cookies can be disabled on the browser. Thus, you can’t rely on cookies for state management.
View State
Each page and each control on the page has View State property. This property allows automatic retention of page and controls state between each trip to server. This means control value is maintained between page postbacks. Viewstate is implemented using _VIEWSTATE, a hidden form field which gets created automatically on each page. You can’t transmit data to other page using view state.
Querystring
Query strings can maintain limited state information. Data can be passed from one page to another with the URL but you can send limited size of data with the URL. Most browsers allow a limit of 255 characters on URL length.
Server-side state management
This kind of mechanism retains state in the server.
Application State
The data stored in the application object can be shared by all the sessions of the application. Application object stores data in the key value pair.
Session State
Session State stores session-specific information and the information is visible within the session only. ASP.NET creates unique sessionId for each session of the application. SessionIDs are maintained either by an HTTP cookie or a modified URL, as set in the application’s configuration settings. By default, SessionID values are stored in a cookie.
Database
Database can be used to store large state information. Database support is used in combination with cookies or session state.
This maintains information on the client’s machine using Cookies, View State, and Query Strings.
Cookies
A cookie is a small text file on the client machine either in the client’s file system or memory of client browser session. Cookies are not good for sensitive data. Moreover, Cookies can be disabled on the browser. Thus, you can’t rely on cookies for state management.
View State
Each page and each control on the page has View State property. This property allows automatic retention of page and controls state between each trip to server. This means control value is maintained between page postbacks. Viewstate is implemented using _VIEWSTATE, a hidden form field which gets created automatically on each page. You can’t transmit data to other page using view state.
Querystring
Query strings can maintain limited state information. Data can be passed from one page to another with the URL but you can send limited size of data with the URL. Most browsers allow a limit of 255 characters on URL length.
Server-side state management
This kind of mechanism retains state in the server.
Application State
The data stored in the application object can be shared by all the sessions of the application. Application object stores data in the key value pair.
Session State
Session State stores session-specific information and the information is visible within the session only. ASP.NET creates unique sessionId for each session of the application. SessionIDs are maintained either by an HTTP cookie or a modified URL, as set in the application’s configuration settings. By default, SessionID values are stored in a cookie.
Database
Database can be used to store large state information. Database support is used in combination with cookies or session state.
20. Explain the difference between Server control and HTML
control.
Answer:
Server events
Server control events are handled in the server whereas HTML control events are handled in the page.
State management
Server controls can maintain data across requests using view state whereas HTML controls have no such mechanism to store data between requests.
Browser detection
Server controls can detect browser automatically and adapt display of control accordingly whereas HTML controls can’t detect browser automatically.
Properties
Server controls contain properties whereas HTML controls have attributes only.
Server control events are handled in the server whereas HTML control events are handled in the page.
State management
Server controls can maintain data across requests using view state whereas HTML controls have no such mechanism to store data between requests.
Browser detection
Server controls can detect browser automatically and adapt display of control accordingly whereas HTML controls can’t detect browser automatically.
Properties
Server controls contain properties whereas HTML controls have attributes only.
21. What are the validation controls available in ASP.NET?
Answer:
ASP.NET validation
controls are:
RequiredFieldValidator: This validates controls if controls contain data.
CompareValidator: This allows checking if data of one control match with other control.
RangeValidator: This verifies if entered data is between two values.
RegularExpressionValidator: This checks if entered data matches a specific format.
CustomValidator: Validate the data entered using a client-side script or a server-side code.
ValidationSummary: This allows developer to display errors in one place.
RequiredFieldValidator: This validates controls if controls contain data.
CompareValidator: This allows checking if data of one control match with other control.
RangeValidator: This verifies if entered data is between two values.
RegularExpressionValidator: This checks if entered data matches a specific format.
CustomValidator: Validate the data entered using a client-side script or a server-side code.
ValidationSummary: This allows developer to display errors in one place.
22. Define the steps to set up validation control.
Answer:
Following are the steps
to set up validation control
Drag a validation control on a web form.
Set the ControlToValidate property to the control to be validated.
If you are using CompareValidator, you have to specify the ControlToCompare property.
Specify the error message you want to display using ErrorMessage property.
You can use ValidationSummary control to show errors at one place.
Drag a validation control on a web form.
Set the ControlToValidate property to the control to be validated.
If you are using CompareValidator, you have to specify the ControlToCompare property.
Specify the error message you want to display using ErrorMessage property.
You can use ValidationSummary control to show errors at one place.
23. What are the navigation ways between pages available in
ASP.NET?
Answer:
Ways to navigate between
pages are:
Hyperlink control
Response.Redirect method
Server.Transfer method
Server.Execute method
Window.Open script method
Hyperlink control
Response.Redirect method
Server.Transfer method
Server.Execute method
Window.Open script method
24. How do you open a page in a new window?
Answer:
To open a page in a new
window, you have to use client script using onclick="window.open()"
attribute of HTML control.
25. Define authentication and authorization.
Answer:
Authorization: The
process of granting access privileges to resources or tasks within an
application.
Authentication: The process of validating the identity of a user.
Authentication: The process of validating the identity of a user.
26. Define caching.
Answer:
Caching is the technique
of storing frequently used items in memory so that they can be accessed more
quickly. Caching technique allows to store/cache page output or application
data on the client on the server. The cached information is used to serve
subsequent requests that avoid the overhead of recreating the same information.
This enhances performance when same information is requested many times by the
user.
27. Define cookie.
Answer:
A cookie is a small file
on the client computer that a web application uses to maintain current session
information. Cookies are used to identity a user in a future session.
28. What is delegate?
Answer:
A delegate acts like a
strongly type function pointer. Delegates can invoke the methods that they
reference without making explicit calls to those methods. It is type safe since
it holds reference of only those methods that match its signature. Unlike other
classes, the delegate class has a signature. Delegates are used to implement
event programming model in .NET application. Delegates enable the methods that
listen for an event, to be abstract.
29. Explain Exception handling in .Net.
Answer:
Exceptions or errors are unusual occurrences that happen within the logic of an application. The CLR has provided structured way to deal with exceptions using Try/Catch block. ASP.NET supports some facilities to handling exceptions using events suck as Page_Error and Application_Error.
Exceptions or errors are unusual occurrences that happen within the logic of an application. The CLR has provided structured way to deal with exceptions using Try/Catch block. ASP.NET supports some facilities to handling exceptions using events suck as Page_Error and Application_Error.
30. What is impersonation?
Answer:
Impersonation means
delegating one user identity to another user. In ASP.NET, the anonymous users
impersonate the ASPNET user account by default. You can use <identity>
element of web.config file to impersonate user. E.g. <identity
impersonate="true"/>
31. What is managed code in .Net?
Answer:
The code that runs under
the guidance of common language runtime (CLR) is called managed code. The
versioning and registration problem which are formally handled by the windows
programming are solved in .Net with the introduction of managed code. The
managed code contains all the versioning and type information that the CLR use
to run the application.
32. What are Merge modules?
Answer:
Merge modules are the
deployment projects for the shared components. If the components are already
installed, the modules merge the changes rather than unnecessarily overwrite
them. When the components are no longer in use, they are removed safely from
the server using Merge modules facility.
33. What is Satellite assembly?
Answer:
Satellite assembly is a
kind of assembly that includes localized resources for an application. Each
satellite assembly contains the resources for one culture.
34. Define secured sockets layer.
Answer:
Secured Socket Layer
(SSL) ensures a secured web application by encrypting the data sent over
internet. When an application is using SSL facility, the server generates an
encryption key for the session and page is encrypted before it sent. The client
browse uses this encryption key to decrypt the requested Web page.
35. Define session in ASP.NET.
Answer:
A session starts when
the browser first request a resources from within the application. The session
gets terminated when either browser closed down or session time out has been
attained. The default time out for the session is 20 minutes.
36. Define Tracing.
Answer:
Tracing is the way to maintain
events in an application. It is useful while the application is in debugging or
in the testing phase. The trace class in the code is used to diagnose problem.
You can use trace messages to your project to monitor events in the released
version of the application. The trace class is found in the System.Diagnostics
namespace. ASP.NET introduces tracing that enables you to write debug
statements in your code, which still remain in the code even after when it is
deployed to production servers.
37. Define View State.
Answer:
ASP.NET preserves data
between postback events using view state. You can save a lot of coding using
view state in the web form. ViewState serialize the state of objects and store
in a hidden field on the page. It retains the state of server-side objects
between postbacks. It represents the status of the page when submitted to the
server. By default, view state is maintained for each page. If you do not want
to maintain the ViewState, include the directive <%@ Page EnableViewState="false"
%> at the top of an .aspx page or add the attribute
EnableViewState="false" to any control. ViewState exist for the life
of the current page.
38. What is application domain?
Answer:
It is the process space
within which ASP.NET application runs. Every application has its own process
space which isolates it from other application. If one of the application
domains throws error it does not affect the other application domains.
39. List down the sequence of methods called during the page
load.
Answer:
Init() - Initializes the
page.
Load() - Loads the page in the server memory.
PreRender() - the brief moment before the page is displayed to the user as HTML
Unload() - runs just after page finishes loading.
Load() - Loads the page in the server memory.
PreRender() - the brief moment before the page is displayed to the user as HTML
Unload() - runs just after page finishes loading.
40. What is the importance of Global.asax in ASP.NET?
Answer:
The Global.asax is used
to implement application and session level events.
41. Define MSIL.
Answer:
MSIL is the Microsoft
Intermediate Language. All .Net languages' executable exists as MSIL which gets
converted into machine specific language using JIT compiler just before
execution.
42. Response.Redirect vs Server.Transfer
Answer:
Server.Transfer is only
applicable for aspx files. It transfers page processing to another page without
making round-trip back to the client's browser. Since no round trips, it offers
faster response and doesn't update client url history list.
Response.Redirect is used to redirect to another page or site. This performs a trip back to the client where the client’s browser is redirected to the new page.
Response.Redirect is used to redirect to another page or site. This performs a trip back to the client where the client’s browser is redirected to the new page.
43. Explain Session state management options in ASP.NET.
Answer:
ASP.NET provides
In-Process and Out-of-Process state management. In-Process stores the session
in memory on the web server. Out-of-Process Session state management stores
data in an external data source such as SQL Server or a State Server service.
Out-of-Process state management requires that all objects stored in session are
serializable.
44. How to turn off cookies for a page?
Answer:
Cookie.Discard Property
when true, instructs the client application not to save the Cookie on the
user's hard disk when a session ends.
45. How can you ensure a permanent cookie?
Answer:
Setting Expires property
to MinValue and restrict cookie to get expired.
46. What is AutoPostback?
Answer:
AutoPostBack
automatically posts the page back to the server when state of the control is
changed.
47. Explain login control and form authentication.
Answer:
Login controls
encapsulate all the features offered by Forms authentication. Login controls
internally use FormsAuthentication class to implement security by prompting for
user credentials validating them.
48. What is the use of Web.config file?
Answer:
Following are the
setting you can incorporate in web.config file.
Database connections
Error Page setting
Session States
Error Handling
Security
Trace setting
Culture specific setting
Database connections
Error Page setting
Session States
Error Handling
Security
Trace setting
Culture specific setting
49. Explain in what order a destructors is called.
Answer:
Destructors are called in
reverse order of constructors. Destructor of most derived class is called
followed by its parent's destructor and so on till the topmost class in the
hierarchy.
50. What is break mode? What are the options to step through
code?
Answer:
Break mode lets you to
observe code line to line in order to locate error. VS.NET provides following
option to step through code.
Step Into
Step Over
Step Out
Run To Cursor
Set Next Statement
Step Into
Step Over
Step Out
Run To Cursor
Set Next Statement
51. Explain how to retrieve property settings from XML .config
file.
Answer:
Create an instance of
AppSettingsReader class, use GetValue method by passing the name of the
property and the type expected. Assign the result to the appropriate variable.
52. Explain Global Assembly Cache.
Answer:
Global Assembly Cache is
the place holder for shared assembly. If an assembly is installed to the Global
Assembly Cache, the assembly can be accessed by multiple applications. In order
to install an assembly to the GAC, the assembly must have to be signed with
strong name.
53. Explain Managed code an Un-managed code.
Answer:
Managed code runs under
the safe supervision of common language runtime. Managed code carries metadata
that is used by common language runtime to offer service like memory
management, code access security, and cross-language accessibility.
Unmanaged code doesn't follow CLR conventions and thus, can't take the advantages of .Framework.
Unmanaged code doesn't follow CLR conventions and thus, can't take the advantages of .Framework.
54. What is side-by-side execution?
Answer:
This means multiple
version of same assembly to run on the same computer. This feature enables to deploy
multiple versions of the component.
55. Define Resource Files.
Answer:
Resource files contains
non-executable data like strings, images etc that are used by an application
and deployed along with it. You can changes these data without recompiling the
whole application.
56. Define Globalization and Localization.
Answer:
Globalization is the
process of creating multilingual application by defining culture specific
features like currency, date and time format, calendar and other issues.
Localization is the process of accommodating cultural differences in an
application.
57. What is reflection?
Answer:
Reflection is a
mechanism through which types defined in the metadata of each module can be
accessed. The System.Reflection namespaces contains classes that can be used to
define the types for an assembly.
58. Define Satellite Assemblies.
Answer:
Satellite Assemblies are
the special kinds of assemblies that exist as DLL and contain culturespecific
resources in a binary format. They store compiled localized application
resources. They can be created using the AL utility and can be deployed even
after deployment of the application. Satellite Assemblies encapsulate resources
into binary format and thus makes resources lighter and consume lesser space on
the disk.
59. What is CAS?
Answer:
CAS is very important
part of .Net security system which verifies if particular piece of code is
allowed to run. It also determines if piece of code have access rights to run
particular resource. .NET security system applies these features using code
groups and permissions. Each assembly of an application is the part of code
group with associated permissions.
60. Explain Automatic Memory Management in .NET.
Answer:
Automatic memory
management in .Net is through garbage collector which is incredibly efficient
in releasing resources when no longer in use.
Latest answer: Forms
authentication can be easily implemented using login controls without writing
any code. Login control performs functions like prompting for user credentials,
validating them and issuing authentication just as the FormsAuthentication
class...............
Read answer
Read answer
Latest answer: Fragment
caching refers to the caching of individual user controls within a Web Form.
Each user control can have independent cache durations and implementations of
how the caching behavior is to be applied.............
Read answer
Read answer
Latest answer: Partial
classes allow us to divide the class definition into multiple files
(physically). Logically, all the partial classes are treated as a single file
by the compiler............
Read answer
Read answer
Latest answer: FromHTMLinasppage:<ahref="abc.aspx?qstring1=test">Test
Query String</a>
From server side code: <%response.redirect "webform1.aspx?id=11"%>...............
From server side code: <%response.redirect "webform1.aspx?id=11"%>...............
Latest answer: Viewstate
is used to maintain or retain values on postback. It helps in preserving a
page. Viewstate is internally maintained as a hidden field in encrypted form
along with a key............
Read answer
Read answer
Latest answer: Src:
is a way mention the name of the code-behind class to dynamically compile on
the request for a page. ...............
Read answer
Read answer
Latest answer: URI - Uniform Resource Identifier: it’s a string and
its responsibility is to identify a resource by meta-information. It gives
information about only one resource............
Read answer
Read answer
Latest answer: It
is a process where things that can be handled before compilation are prepared
in order to reduce the deployment time, response time, increase safety. It’s
main aim to boost performance.............
Read answer
Read answer
Latest answer: Custom
controls are user defined controls. They can be created by grouping existing
controls, by deriving the control from System.Web.UI.WebControls..........
Read answer
Read answer
Latest answer: An
operating system process can have many ongoing application domains. Application
Domains keep an application separate. All objects created within the same
application scope are created within the same application domain...........
Read answer
Read answer
Latest answer: SAO
Server Activated Object (call mode): lasts the lifetime of the server. They are
activated as SingleCall/Singleton objects. It makes objects
stateless...........
Read answer
Read answer
Latest answer: Remoting
has at least three sections:-
1. Server
2. Client: This connects to the hosted remoting object
3. Common Interface between client and the server .i.e. the channel..........
Read answer
2. Client: This connects to the hosted remoting object
3. Common Interface between client and the server .i.e. the channel..........
Read answer
Latest answer: Singleton
architecture is to be used when all the applications have to use or share same
data...........
Read answer
Read answer
Latest answer: The
LeaseTime property protects the object so that the garbage collector does not
destroy it as remoting objects are beyond the scope of the garbage collector.
Every object created has a default leasetime for which it will be
activated..........
Read answer
Read answer
Latest answer: The
remoting parameters can be specified through both programming and in config
files. All the settings defined in config files are placed under
<system.runtime.remoting>...........
Read answer
Read answer
Latest answer: Marshaling
is a process of transforming or serializing data from one application domain
and exporting it to another application domain...........
Read answer
Read answer
Latest answer: ObjRef
is a searializable object returned by Marshal() that knows about location of
the remote object, host name, port number, and object name........
Read answer
Read answer
Latest answer: Every
service listed has a URI pointing to the service's DISCO or WSDL document,
which is needed to access the webservice and its 'webmethod"
methods..........
Read answer
Read answer
Latest answer: Create
a new website by selecting "ASP.NET Web Site" and giving it a
suitable name. service.cs file appears inside the solution with a default
webmethod named as "HelloWorld()"........
Read answer
Read answer
Latest answer: Application
Object: Application variable/object stores an Object with a scope of
availability of the entire Application unless explicitly destroyed.............
Read answer
Read answer
Latest answer: The
cache object has dependencies e.g. relationships to the file it stores. Cache
items remove the object when these dependencies change. As a work around we
would need to simply execute a callback method............
Read answer
Read answer
Latest answer: A
process where items are removed from cache in order to free the memory based on
their priority. A property called "CacheItemPriority" is used to
figure out the priority of each item inside the cache...........
Read answer
Read answer
Latest answer: Page
output: Is used to fetch information or data at page level. It is best used
when the site is mainly static. Used by declaring the output page
directive............
Read answer
Read answer
Latest answer: The
ways to cache different versions on the same page using ASP.NET cache object is
using OutputCache object............
Read answer
Read answer
Latest answer: Fragment
cache is to store user controls individually within a web form in cache instead
of the whole webform as such. The idea is to simply have different cache
parameters for different user controls.............
Read answer
Read answer
Latest answer: Types
of sessions: InProc: The default way to use sessions. InProc is the fastest way
to store and access sessions...........
Read answer
Read answer
Latest answer: Advantages: Easy
to implement, Hidden fields are supported by all browsers, Enables
faster access of information because data is stored on client side............
Read answer
Read answer
Latest answer: Advantages: Hidden frames allow you to cache more than one
data field, The ability to cache and access data items stored in different
hidden forms...........
Read answer
Read answer
Latest answer: Advantages: They are simple to use. Light in size, thus
occupy less memory. Stores server information on client side. Data
need not to be sent back to server........
Read answer
Read answer
Latest answer: Querystring
is way to transfer information from one page to another through the URL........
Read answer
Read answer
Latest answer: Absolute
and sliding expiration are two Time based expiration strategies. Absolute
Expiration: Cache in this case expires at a fixed specified date or
time..............
Read answer
Read answer
Latest answer: Cross-page
posting is done at the control level. It is possible to create a page that
posts to different pages depending on what button the user clicks on. It is
handled by done by changing the postbackurl property of the controls..........
Read answer
Read answer
Latest answer: PreviousPage
property is set to the page property of the nest page to access the viewstate
value of the page in the next page. Page poster = this.PreviousPage;..........
Read answer
Read answer
Latest answer: SQL
Cache Dependency in ASP.NET: It is the mechanism where the cache object gets invalidated
when the related data or the related resource is modified.........
Read answer
Read answer
Latest answer: Post
Cache Substitution: It works opposite to fragment caching. The entire page is
cached, except what is to be kept dynamic. When [OutputCache] attribute is
used, the page is cached............
Read answer
Read answer
Latest answer: Users
of different countries, use different languages and others settings like
currency, and dates. Therefore, applications are needed to be configurable as
per the required settings based on cultures, regions, countries........
Read answer
Read answer
Latest answer: Code
Page was used before Unicode came into existence. It was a technique to
represent characters in different languages..........
Read answer
Read answer
Latest answer: Resource
files are files in XML format. They contain all the resources needed by an
application. These files can be used to store string, bitmaps, icons,
fonts........
Read answer
Read answer
Latest answer: To
support the feature of multiple languages, we need to create different modules
that are customized on the basis of localization. These assemblies created on
the basis of different modules are knows as satellite assemblies...........
Read answer
Read answer
Latest answer: Al.exe:
It embeds the resources into a satellite assembly. It takes the resources in
.resources binary format.......
Read answer
Read answer
Latest answer: ResourceManager
class: It provides convenient access to resources that are culture-correct. The
access is provided at run time.........
Read answer
Read answer
Latest answer: WCF
is a framework that builds applications that can inter-communicate based on
service oriented architecture consuming secure and reliable web
services.............
Read answer
Read answer
Latest answer: A
service-oriented architecture is collection of services which communicate with
one another other......
Read answer
Read answer
Latest answer: WCF
Service is composed of three components: Service class: It implements the
service needed, Host environment: is an environment that hosts the developed
service.............
Read answer
Read answer
Latest answer: WCF
can create services similar in concept to ASMX, but has much more capabilities.
WCF is much more efficient than ASP.Net coz it is implemented on
pipeline............
Read answer
Read answer
Latest answer: Duplex
contract: It enables clients and servers to communicate with each other. The
calls can be initiated independently of the other one.............
Read answer
Read answer
Latest answer: Read
Uncommitted: - Also known as Dirty isolation level. It makes sure that corrupt
Data cannot be read. This is the lowest isolation level............
Read answer
Read answer
Latest answer: Volatile
Queues: There are scenarios in the project when you want the message to deliver
in proper time. The timely delivery of message is very more important and to
ensure they are not lost is important too. Volatile queues are used for such
purposes.............
Read answer
Read answer
Latest answer: Windows
Workflow Foundation (WF): It is a platform for
building, managing and executing workflow-enabled applications, for designing
and implementing a programming model ..........
Read answer
Read answer
Latest answer: There
are 3 types of workflows in WWF: Sequential Workflow: The sequential workflow
style executes a set of contained activities in order, one by one and does not
provide an option to go back to any step...........
Read answer
Read answer
Latest answer: XOML
is an acronym for Extensible Object Markup Language. XOML files are the markup
files. They are used to declare the workflow and are then compiled with the
file containing the implementation logic..............
Read answer
Read answer
Latest answer: Microsoft's
Internet Information Services web server software is used to make an
application offline. The IIS is instructed to route all incoming requests for
the web site to another URL automatically........
Read answer
Read answer
Latest answer: Script
injection attacks called Cross-site scripting (XSS) attacks exploit
vulnerabilities in Web page validation by injecting client-side script
code.............
Read answer
Read answer
Latest answer: Authentication
is the process of verifying user’s details and find if the user is a valid user
to the system or not. This process of authentication is needed to provide
authority to the user........
Read answer
Read answer
Latest answer: Authorization
is a process that takes place based on the authentication of the user. Once
authenticated, based on user’s credentials, it is determined what rights des a
user have...........
Read answer
Read answer
Login controls are part
of ASP. Net’s UI controls collection which allows users to enter their username
and password to login to a website/application. They provide login solution
without the need of writing code...........
Read answer
Read answer
Fragment caching does
not cache a WebForm, rather it allows for caching of individual user controls
within a Web Form, where each control can have different cache duration and
behavior...........
Read answer
Read answer
.Net2.0 supports the
concept of partial classes which is unlike the concept of one class one file.
In .Net technology, one can define a single class over multiple files using the
concept of partial classes............
Read answer
Read answer
Yesyoucandoitusingahyperlink<BR><ahref="Abc.aspx?name=test">Click
to go to aspx </a>.............
Read answer
Read answer
.NET Compact Framework
is a scaled down versions of .NET framework for supporting Windows CE based
mobile and embedded devices like mobile phones...............
LINQ is a set of
extensions to .NET Framework that encapsulate language integrated query, set
and other transformation operations....................
Access modifiers are
used to control the scope of type members.
There arefive access modifiers that p rovide varying levels of access...........
Read answer
There arefive access modifiers that p rovide varying levels of access...........
Read answer
In C#.NET, we implement
using ":"
In VB.Net we implements using "Inherits" keyword...........
Read answer
In VB.Net we implements using "Inherits" keyword...........
Read answer
Server-side code
executes on the server.
Client-side code executes in the client's browser..........
Read answer
Client-side code executes in the client's browser..........
Read answer
A Dataset can represent
an entire relational database in memory, complete with tables, relations, and
views...............
Read answer
Read answer
The Global.asax is
including the Global.asax.cs file.
You can implement application........
Read answer
You can implement application........
Read answer
Inline code written
along side the html in a page.
Code-behind is code written in a separate file and referenced by the .aspx page........
Read answer
Code-behind is code written in a separate file and referenced by the .aspx page........
Read answer
MSIL is the Microsoft
Intermediate Language.
.NET compatible application will get converted to MSIL on compilation...........
Read answer
.NET compatible application will get converted to MSIL on compilation...........
Read answer
Low (IIS Process): This
is the fastest and the default IIS4 setting. ASP pages run in INetInfo.exe and
so they are executed in-process. If ASP crashes, IIS too does and must be
restarted...........
What
is Shared (static) member?
It belongs to the type but not to any instance of a type.
It can be accessed without creating an instance of the type..............
Read answer
It can be accessed without creating an instance of the type..............
Read answer
What
is the transport protocol you use to call a Web service?
What is Option
Strict used for?
Define
Boxing an Unboxing.
Boxing allows you to treat a value type the same as a reference
type........
Read answer
What does WSDL stand for?
Read answer
What does WSDL stand for?
Define
ViewState in ASP.NET.
It allows the state of objects (serializable) to be stored in a
hidden field on the page.
It is transported to the client and back to the server, and is not stored on the server or any other external source...............
Read answer
It is transported to the client and back to the server, and is not stored on the server or any other external source...............
Read answer
What
is the lifespan for items stored in ViewState?
Define
EnableViewState property.
It allows the page to save the users input on a form across
postbacks.
It saves the server-side values for a given control into ViewState.............
Read answer
It saves the server-side values for a given control into ViewState.............
Read answer
What are
Delegates?
Delegates provide the functionality behind events.
A delegate is a strongly typed function pointer................
Read answer
A delegate is a strongly typed function pointer................
Read answer
What
are Classes?
Classes are the blueprints for objects.
A class acts as a template for any number of distinct objects.........
Read answer
A class acts as a template for any number of distinct objects.........
Read answer
What is Encapsulation?
Different
types of Session state management options available with ASP.NET?
ASP.NET provides In-Process and Out-of-Process state management.
In-Process stores the session in memory on the web server.............
Read answer
What methods are fired
during the page load? In-Process stores the session in memory on the web server.............
Read answer
Init() - when the page is instantiated.
Load() - when the page is loaded into server memory.........
Read answer
Load() - when the page is loaded into server memory.........
Read answer
Explain
ADO.NET.
It is data-access technology, primarily disconnected and designed
to provide efficient, scalable data access. The disconnected data is
represented within a DataSet object.............
Define
Server-side and Client-side code in ASP.NET.
Server-side code runs on the server.Client-side code runs on the
client's browser................
Read answer
Read answer
What
tag do you use to add a hyperlink column to the DataGrid?
Where does VS.NET store
Web application projects?
Web application projects create a virtual folder for each project
where all the files of the projects are stored.........
Read answer
Describe Web
application’s life cycle. Read answer
A Web application starts with the first request for a resource. On
request, Web forms are instantiated and processed in the server...........
Read answer
Define class module and
a code module. Read answer
Steps to execute a stored procedure from Web Application.
Create a command object. Set the object’s CommandText
property to the name of the stored procedure.
Set the CommandType property to stored Procedure............
Read answer
Describe exception
handling in ASP.NET. Set the CommandType property to stored Procedure............
Read answer
Exception handling correct unusual occurrences and prevent
application from getting terminated.........
Read answer
Read answer
What
are the exception-handling ways in ASP.NET?
Exceptions can be handled by using Try(try) block and Error event
procedures at the global, application, or page levels by using the Server
object’s GetLastError and ClearError methods..........
Describe
use of error pages in ASP.NET.
Error pages are used when exceptions are outside the scope of the
application and the application can’t respond directly to these
exceptions................
Read answer
Read answer
Explain
tracing in ASP.NET.
Tracing records unusual
events while an application is running. It helps in observing problems during
testing and after deployment.............
Read answer
Read answer
What
is the use of ComVisible attribute?
ComVisible attribute is
used to select which public .NET classes and members are visible to
COM.........
Read answer
Read answer
Define
Windows and Forms authentication.
Windows authentication is
the default authentication method of the ASP.NET application. It uses security
scheme of windows operating system of corporate network.............
Read answer
Read answer
What is Secure Sockets
Layer (SSL) security?
SSL protects data
exchanged between a client and an ASP.NET application by encrypting the data
before it is sent across the internet.............
Read answer
Read answer
Why
is the Machine.config file?
The Machine.config file
controls issue like process recycling, number of request queue limits, and what
interval to check if user is connected..........
Read answer
Read answer
Explain how to
distribute shared components as part of an installation program
Shared components should
be included as a merge module within the setup project. Merge modules can’t be
installed by themselves..................
Read answer
Read answer
Define
Unit testing, Integration testing, Regression testing.
Unit testing ensures that
each piece of code works correctly. Integration testing ensures each module
work together without errors............
Read answer
Read answer
Define HTML and XML.
HTML: It has predefined
elements names '<h1>', '<b>' etc.............
|
|
||||||||||||
What
are server controls?
ASP.NET server
controls are components that run on the server and encapsulate user-interface
and other related functionality. They are used in ASP.NET pages and in ASP.NET
code-behind classes.
|
What is the
difference between Web User Control and Web Custom Control?
Custom Controls Web custom controls are compiled components that run on the server and that encapsulate user-interface and other related functionality into reusable packages. They can include all the design-time features of standard ASP.NET server controls, including full support for Visual Studio design features such as the Properties window, the visual designer, and the Toolbox There are several ways that you can create Web custom controls: You can compile a control that combines the functionality of two or more existing |
controls. For
example if you need a control that encapsulates a button and a text box, you
can create it by compiling the existing controls together. · If an existing server control almost meets your
requirements but lacks some required features, you can customize the control by
deriving from it and overriding its properties, methods, and events. if none of
the existing Web server controls (or their combinations) meet your
requirements, you can create a custom control by deriving from one of the base
control classes.
These classes
provide all the basic functionality of Web server controls, so you can focus on
programming the features you need. If none of the existing ASP.NET server
controls meet the specific requirements of your applications, you can create
either a Web user control or a Web custom control that encapsulates the
functionality you need. The main difference between the two controls lies in
ease of creation vs. ease of use at design time.
Web user
controls are easy to make, but they can be less convenient to use in advanced
scenarios. You develop Web user controls almost exactly the same way that you
develop Web Forms pages. Like Web Forms, user controls can be created in the
visual designer, they can be written with code separated from the HTML, and
they can handle execution events. However, because Web user controls are
compiled dynamically at run time they cannot be added to the Toolbox, and they
are represented by a simple placeholder glyph when added to a page. This makes
Web user controls harder to use if you are accustomed to full Visual Studio
.NET design-time support, including the Properties window and Design view
previews. Also, the only way to share the user control between applications is
to put a separate copy in each application, which takes more maintenance if you
make changes to the control.
Web custom controls are compiled code, which makes them easier to use but more difficult to create; Web custom controls must be authored in code. Once you have created the control, however, you can add it to the Toolbox and display it in a visual designer with full Properties window support and all the other design-time features of ASP.NET server controls.
Web custom controls are compiled code, which makes them easier to use but more difficult to create; Web custom controls must be authored in code. Once you have created the control, however, you can add it to the Toolbox and display it in a visual designer with full Properties window support and all the other design-time features of ASP.NET server controls.
In addition,
you can install a single copy of the Web custom control in the global assembly
cache and share it between applications, which makes maintenance easier.Web
user controls Web custom controls/Easier to create Harder to create/ Limited
support for consumers who use a visual design tool Full visual design tool
support for consumers A separate copy of the control is required in each
application Only a single copy of the control is required, in the global
assembly cache Cannot be added to the Toolbox in Visual Studio Can be added to
the Toolbox in Visual Studio Good for static layout Good for dynamic layout
(Session/State)
7. Application and Session Events
The ASP.NET page framework provides ways for you to work with events that can be raised when your application starts or stops or when an individual user's session starts or stops:
· Application events are raised for all requests to an application. For example, Application_BeginRequest is raised when any Web Forms page or XML Web service in your application is requested. This event allows you to initialize resources that will be used for each request to the application. A corresponding event, Application_EndRequest, provides you with an opportunity to close or otherwise dispose of resources used for the request.
· Session events are similar to application events (there is a Session_OnStart and a Session_OnEnd event), but are raised with each unique session within the application. A session begins when a user requests a page for the first time from your application and ends either when your application explicitly closes the session or when the session times out.
You can create handlers for these types of events in the Global.asax file.
8. Difference between ASP Session and ASP.NET Session?
asp.net session supports cookie less session & it can span across multiple servers.
9. What is cookie less session? How it works?
By default, ASP.NET will store the session state in the same process that processes the request, just as ASP does. If cookies are not available, a session can be tracked by adding a session identifier to the URL. This can be enabled by setting the following:
<sessionState cookieless="true" />
http://samples.gotdotnet.com/quickstart/aspplus/doc/stateoverview.aspx
10. How you will handle session when deploying application in more than a server? Describe session handling in a webfarm, how does it work and what are the limits?
By default, ASP.NET will store the session state in the same process that processes the request, just as ASP does. Additionally, ASP.NET can store session data in an external process, which can even reside on another machine. To enable this feature:
· Start the ASP.NET state service, either using the Services snap-in or by executing "net start aspnet_state" on the command line. The state service will by default listen on port 42424. To change the port, modify the registry key for the service: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\Port
· Set the mode attribute of the <sessionState> section to "StateServer".
· Configure the stateConnectionString attribute with the values of the machine on which you started aspnet_state.
The following sample assumes that the state service is running on the same machine as the Web server ("localhost") and uses the default port (42424):
<sessionState mode="StateServer" stateConnectionString="tcpip=localhost:42424" />
Note that if you try the sample above with this setting, you can reset the Web server (enter iisreset on the command line) and the session state value will persist.
**
11. What method do you use to explicitly kill a users session?
Abandon()
12. What are the different ways you would consider sending data across pages in ASP (i.e between 1.asp to 2.asp)?
Session
public properties
13. What is State Management in .Net and how many ways are there to maintain a state in .Net? What is view state?
Web pages are recreated each time the page is posted to the server. In traditional Web programming, this would ordinarily mean that all information associated with the page and the controls on the page would be lost with each round trip.
To overcome this inherent limitation of traditional Web programming, the ASP.NET page framework includes various options to help you preserve changes — that is, for managing state. The page framework includes a facility called view state that automatically preserves property values of the page and all the controls on it between round trips.
However, you will probably also have application-specific values that you want to preserve. To do so, you can use one of the state management options.
Client-Based State Management Options:
View State
Hidden Form Fields
Cookies
Query Strings
Server-Based State Management Options
Application State
Session State
Database Support
14. What are the disadvantages of view state / what are the benefits?
Automatic view-state management is a feature of server controls that enables them to repopulate their property values on a round trip (without you having to write any code). This feature does impact performance, however, since a server control's view state is passed to and from the server in a hidden form field. You should be aware of when view state helps you and when it hinders your page's performance.
15. When maintaining session through Sql server, what is the impact of Read and Write operation on Session objects? will performance degrade?
Maintaining state using database technology is a common practice when storing user-specific information where the information store is large. Database storage is particularly useful for maintaining long-term state or state that must be preserved even if the server must be restarted.
**
16. What are the contents of cookie?
**
17. How do you create a permanent cookie?
**
18. What is ViewState? What does the "EnableViewState" property do? Why would I want it on or off?
**
19. Explain the differences between Server-side and Client-side code?
Server side code will process at server side & it will send the result to client. Client side code (javascript) will execute only at client side.
20. Can you give an example of what might be best suited to place in the Application_Start and Session_Start subroutines?
**
21. Which ASP.NET configuration options are supported in the ASP.NET implementation on the shared web hosting platform?
A: Many of the ASP.NET configuration options are not configurable at the site, application or subdirectory level on the shared hosting platform. Certain options can affect the security, performance and stability of the server and, therefore cannot be changed. The following settings are the only ones that can be changed in your site’s web.config file (s):
browserCaps
clientTarget
pages
customErrors
globalization
authorization
authentication
webControls
webServices
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconaspnetconfiguration.asp
22. Briefly describe the role of global.asax?
23. How can u debug your .net application?
24. How do u deploy your asp.net application?
25. Where do we store our connection string in asp.net application?
26. Various steps taken to optimize a web based application (caching, stored procedure etc.)
27. How does ASP.NET framework maps client side events to Server side events.
(Security)
28. Security types in ASP/ASP.NET? Different Authentication modes?
29. How .Net has implemented security for web applications?
30. How to do Forms authentication in asp.net?
31. Explain authentication levels in .net ?
32. Explain autherization levels in .net ?
33. What is Role-Based security?
A role is a named set of principals that have the same privileges with respect to security (such as a teller or a manager). A principal can be a member of one or more roles. Therefore, applications can use role membership to determine whether a principal is authorized to perform a requested action.
**
34. How will you do windows authentication and what is the namespace? If a user is logged under integrated windows authentication mode, but he is still not able to logon, what might be the possible cause for this? In ASP.Net application how do you find the name of the logged in person under windows authentication?
35. What are the different authentication modes in the .NET environment?
36. <authentication mode="Windows|Forms|Passport|None">
37. <forms name="name"
38. loginUrl="url"
39. protection="All|None|Encryption|Validation"
40. timeout="30" path="/" >
41. requireSSL="true|false"
42. slidingExpiration="true|false">
43. <credentials passwordFormat="Clear|SHA1|MD5">
44. <user name="username" password="password"/>
45. </credentials>
46. </forms>
47. <passport redirectUrl="internal"/>
</authentication>
Attribute Option Description
mode Controls the default authentication mode for an application.
Windows Specifies Windows authentication as the default authentication mode. Use this mode when using any form of Microsoft Internet Information Services (IIS) authentication: Basic, Digest, Integrated Windows authentication (NTLM/Kerberos), or certificates.
Forms Specifies ASP.NET forms-based authentication as the default authentication mode.
Passport Specifies Microsoft Passport authentication as the default authentication mode.
None Specifies no authentication. Only anonymous users are expected or applications can handle events to provide their own authentication.
48. How do you specify whether your data should be passed as Query string and Forms (Mainly about POST and GET)
Through attribute tag of form tag.
49. What is the other method, other than GET and POST, in ASP.NET?
50. What are validator? Name the Validation controls in asp.net? How do u disable them? Will the asp.net validators run in server side or client side? How do you do Client-side validation in .Net? How to disable validator control by client side JavaScript?
A set of server controls included with ASP.NET that test user input in HTML and Web server controls for programmer-defined requirements. Validation controls perform input checking in server code. If the user is working with a browser that supports DHTML, the validation controls can also perform validation ("EnableClientScript" property set to true/false) using client script.
The following validation controls are available in asp.net:
RequiredFieldValidator Control, CompareValidator Control, RangeValidator Control, RegularExpressionValidator Control, CustomValidator Control, ValidationSummary Control.
51. Which two properties are there on every validation control?
ControlToValidate, ErrorMessage
52. How do you use css in asp.net?
Within the <HEAD> section of an HTML document that will use these styles, add a link to this external CSS style sheet that
follows this form:
<LINK REL="STYLESHEET" TYPE="text/css" HREF="MyStyles.css">
MyStyles.css is the name of your external CSS style sheet.
53. How do you implement postback with a text box? What is postback and usestate?
Make AutoPostBack property to true
54. How can you debug an ASP page, without touching the code?
55. What is SQL injection?
An SQL injection attack "injects" or manipulates SQL code by adding unexpected SQL to a query.
Many web pages take parameters from web user, and make SQL query to the database. Take for instance when a user login, web page that user name and password and make SQL query to the database to check if a user has valid name and password.
Username: ' or 1=1 ---
Password: [Empty]
This would execute the following query against the users table:
select count(*) from users where userName='' or 1=1 --' and userPass=''
56. How can u handle Exceptions in Asp.Net?
57. How can u handle Un Managed Code Exceptions in ASP.Net?
58. Asp.net - How to find last error which occurred?
A: Server.GetLastError();
[C#]
Exception LastError;
String ErrMessage;
LastError = Server.GetLastError();
if (LastError != null)
ErrMessage = LastError.Message;
else
ErrMessage = "No Errors";
Response.Write("Last Error = " + ErrMessage);
59. How to do Caching in ASP?
A: <%@ OutputCache Duration="60" VaryByParam="None" %>
VaryByParam value Description
none One version of page cached (only raw GET)
* n versions of page cached based on query string and/or POST body
v1 n versions of page cached based on value of v1 variable in query string or POST body
v1;v2 n versions of page cached based on value of v1 and v2 variables in query string or POST body
60. <%@ OutputCache Duration="60" VaryByParam="none" %>
<%@ OutputCache Duration="60" VaryByParam="*" %>
<%@ OutputCache Duration="60" VaryByParam="name;age" %>
The OutputCache directive supports several other cache varying options
· VaryByHeader - maintain separate cache entry for header string changes (UserAgent, UserLanguage, etc.)
· VaryByControl - for user controls, maintain separate cache entry for properties of a user control
· VaryByCustom - can specify separate cache entries for browser types and version or provide a custom GetVaryByCustomString method in HttpApplicationderived class
61. What is the Global ASA(X) File?
62. Any alternative to avoid name collisions other then Namespaces.
A scenario that two namespaces named N1 and N2 are there both having the same class say A. now in another class i ve written
using N1;using N2;
and i am instantiating class A in this class. Then how will u avoid name collisions?
Ans: using alias
Eg: using MyAlias = MyCompany.Proj.Nested;
63. Which is the namespace used to write error message in event Log File?
64. What are the page level transaction and class level transaction?
65. What are different transaction options?
66. What is the namespace for encryption?
67. What is the difference between application and cache variables?
68. What is the difference between control and component?
69. You ve defined one page_load event in aspx page and same page_load event in code behind how will prog run?
70. Where would you use an IHttpModule, and what are the limitations of any approach you might take in implementing one?
71. Can you edit data in the Repeater control? Which template must you provide, in order to display data in a Repeater control? How can you provide an alternating color scheme in a Repeater control? What property must you set, and what method must you call in your code, in order to bind the data from some data source to the Repeater control?
72. What is the use of web.config? Difference between machine.config and Web.config?
ASP.NET configuration files are XML-based text files--each named web.config--that can appear in any directory on an ASP.NET
Web application server. Each web.config file applies configuration settings to the directory it is located in and to all
virtual child directories beneath it. Settings in child directories can optionally override or modify settings specified in
parent directories. The root configuration file--WinNT\Microsoft.NET\Framework\<version>\config\machine.config--provides
default configuration settings for the entire machine. ASP.NET configures IIS to prevent direct browser access to web.config
files to ensure that their values cannot become public (attempts to access them will cause ASP.NET to return 403: Access
Forbidden).
At run time ASP.NET uses these web.config configuration files to hierarchically compute a unique collection of settings for
each incoming URL target request (these settings are calculated only once and then cached across subsequent requests; ASP.NET
automatically watches for file changes and will invalidate the cache if any of the configuration files change).
http://samples.gotdotnet.com/quickstart/aspplus/doc/configformat.aspx
73. What is the use of sessionstate tag in the web.config file?
Configuring session state: Session state features can be configured via the <sessionState> section in a web.config file. To double the default timeout of 20 minutes, you can add the following to the web.config file of an application:
<sessionState
timeout="40"
/>
74. What are the different modes for the sessionstates in the web.config file?
Off Indicates that session state is not enabled.
Inproc Indicates that session state is stored locally.
StateServer Indicates that session state is stored on a remote server.
SQLServer Indicates that session state is stored on the SQL Server.
75. What is smart navigation?
When a page is requested by an Internet Explorer 5 browser, or later, smart navigation enhances the user's experience of the page by performing the following:
· eliminating the flash caused by navigation.
· persisting the scroll position when moving from page to page.
· persisting element focus between navigations.
· retaining only the last page state in the browser's history.
Smart navigation is best used with ASP.NET pages that require frequent postbacks but with visual content that does not change dramatically on return. Consider this carefully when deciding whether to set this property to true.
Set the SmartNavigation attribute to true in the @ Page directive in the .aspx file. When the page is requested, the dynamically generated class sets this property.
76. In what order do the events of an ASPX page execute. As a developer is it important to undertsand these events?
77. How would you get ASP.NET running in Apache web servers - why would you even do this?
78. What tags do you need to add within the asp:datagrid tags to bind columns manually
79. What base class do all Web Forms inherit from?
System.Web.UI.Page
80. How can we create pie chart in asp.net?
81. Is it possible for me to change my aspx file extension to some other name?
Yes.
Open IIS->Default Website -> Properties
Select HomeDirectory tab
Click on configuration button
Click on add. Enter aspnet_isapi details (C:\WINDOWS\Microsoft.NET\Framework\v1.0.3705\aspnet_isapi.dll | GET,HEAD,POST,DEBUG)
Open machine.config(C:\WINDOWS\Microsoft.NET\Framework\v1.0.3705\CONFIG) & add new extension under <httpHandlers> tag
<add verb="*" path="*.santhosh" type="System.Web.UI.PageHandlerFactory"/>
82. What is AutoEventWireup attribute for ?
(Session/State)
7. Application and Session Events
The ASP.NET page framework provides ways for you to work with events that can be raised when your application starts or stops or when an individual user's session starts or stops:
· Application events are raised for all requests to an application. For example, Application_BeginRequest is raised when any Web Forms page or XML Web service in your application is requested. This event allows you to initialize resources that will be used for each request to the application. A corresponding event, Application_EndRequest, provides you with an opportunity to close or otherwise dispose of resources used for the request.
· Session events are similar to application events (there is a Session_OnStart and a Session_OnEnd event), but are raised with each unique session within the application. A session begins when a user requests a page for the first time from your application and ends either when your application explicitly closes the session or when the session times out.
You can create handlers for these types of events in the Global.asax file.
8. Difference between ASP Session and ASP.NET Session?
asp.net session supports cookie less session & it can span across multiple servers.
9. What is cookie less session? How it works?
By default, ASP.NET will store the session state in the same process that processes the request, just as ASP does. If cookies are not available, a session can be tracked by adding a session identifier to the URL. This can be enabled by setting the following:
<sessionState cookieless="true" />
http://samples.gotdotnet.com/quickstart/aspplus/doc/stateoverview.aspx
10. How you will handle session when deploying application in more than a server? Describe session handling in a webfarm, how does it work and what are the limits?
By default, ASP.NET will store the session state in the same process that processes the request, just as ASP does. Additionally, ASP.NET can store session data in an external process, which can even reside on another machine. To enable this feature:
· Start the ASP.NET state service, either using the Services snap-in or by executing "net start aspnet_state" on the command line. The state service will by default listen on port 42424. To change the port, modify the registry key for the service: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\Port
· Set the mode attribute of the <sessionState> section to "StateServer".
· Configure the stateConnectionString attribute with the values of the machine on which you started aspnet_state.
The following sample assumes that the state service is running on the same machine as the Web server ("localhost") and uses the default port (42424):
<sessionState mode="StateServer" stateConnectionString="tcpip=localhost:42424" />
Note that if you try the sample above with this setting, you can reset the Web server (enter iisreset on the command line) and the session state value will persist.
**
11. What method do you use to explicitly kill a users session?
Abandon()
12. What are the different ways you would consider sending data across pages in ASP (i.e between 1.asp to 2.asp)?
Session
public properties
13. What is State Management in .Net and how many ways are there to maintain a state in .Net? What is view state?
Web pages are recreated each time the page is posted to the server. In traditional Web programming, this would ordinarily mean that all information associated with the page and the controls on the page would be lost with each round trip.
To overcome this inherent limitation of traditional Web programming, the ASP.NET page framework includes various options to help you preserve changes — that is, for managing state. The page framework includes a facility called view state that automatically preserves property values of the page and all the controls on it between round trips.
However, you will probably also have application-specific values that you want to preserve. To do so, you can use one of the state management options.
Client-Based State Management Options:
View State
Hidden Form Fields
Cookies
Query Strings
Server-Based State Management Options
Application State
Session State
Database Support
14. What are the disadvantages of view state / what are the benefits?
Automatic view-state management is a feature of server controls that enables them to repopulate their property values on a round trip (without you having to write any code). This feature does impact performance, however, since a server control's view state is passed to and from the server in a hidden form field. You should be aware of when view state helps you and when it hinders your page's performance.
15. When maintaining session through Sql server, what is the impact of Read and Write operation on Session objects? will performance degrade?
Maintaining state using database technology is a common practice when storing user-specific information where the information store is large. Database storage is particularly useful for maintaining long-term state or state that must be preserved even if the server must be restarted.
**
16. What are the contents of cookie?
**
17. How do you create a permanent cookie?
**
18. What is ViewState? What does the "EnableViewState" property do? Why would I want it on or off?
**
19. Explain the differences between Server-side and Client-side code?
Server side code will process at server side & it will send the result to client. Client side code (javascript) will execute only at client side.
20. Can you give an example of what might be best suited to place in the Application_Start and Session_Start subroutines?
**
21. Which ASP.NET configuration options are supported in the ASP.NET implementation on the shared web hosting platform?
A: Many of the ASP.NET configuration options are not configurable at the site, application or subdirectory level on the shared hosting platform. Certain options can affect the security, performance and stability of the server and, therefore cannot be changed. The following settings are the only ones that can be changed in your site’s web.config file (s):
browserCaps
clientTarget
pages
customErrors
globalization
authorization
authentication
webControls
webServices
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconaspnetconfiguration.asp
22. Briefly describe the role of global.asax?
23. How can u debug your .net application?
24. How do u deploy your asp.net application?
25. Where do we store our connection string in asp.net application?
26. Various steps taken to optimize a web based application (caching, stored procedure etc.)
27. How does ASP.NET framework maps client side events to Server side events.
(Security)
28. Security types in ASP/ASP.NET? Different Authentication modes?
29. How .Net has implemented security for web applications?
30. How to do Forms authentication in asp.net?
31. Explain authentication levels in .net ?
32. Explain autherization levels in .net ?
33. What is Role-Based security?
A role is a named set of principals that have the same privileges with respect to security (such as a teller or a manager). A principal can be a member of one or more roles. Therefore, applications can use role membership to determine whether a principal is authorized to perform a requested action.
**
34. How will you do windows authentication and what is the namespace? If a user is logged under integrated windows authentication mode, but he is still not able to logon, what might be the possible cause for this? In ASP.Net application how do you find the name of the logged in person under windows authentication?
35. What are the different authentication modes in the .NET environment?
36. <authentication mode="Windows|Forms|Passport|None">
37. <forms name="name"
38. loginUrl="url"
39. protection="All|None|Encryption|Validation"
40. timeout="30" path="/" >
41. requireSSL="true|false"
42. slidingExpiration="true|false">
43. <credentials passwordFormat="Clear|SHA1|MD5">
44. <user name="username" password="password"/>
45. </credentials>
46. </forms>
47. <passport redirectUrl="internal"/>
</authentication>
Attribute Option Description
mode Controls the default authentication mode for an application.
Windows Specifies Windows authentication as the default authentication mode. Use this mode when using any form of Microsoft Internet Information Services (IIS) authentication: Basic, Digest, Integrated Windows authentication (NTLM/Kerberos), or certificates.
Forms Specifies ASP.NET forms-based authentication as the default authentication mode.
Passport Specifies Microsoft Passport authentication as the default authentication mode.
None Specifies no authentication. Only anonymous users are expected or applications can handle events to provide their own authentication.
48. How do you specify whether your data should be passed as Query string and Forms (Mainly about POST and GET)
Through attribute tag of form tag.
49. What is the other method, other than GET and POST, in ASP.NET?
50. What are validator? Name the Validation controls in asp.net? How do u disable them? Will the asp.net validators run in server side or client side? How do you do Client-side validation in .Net? How to disable validator control by client side JavaScript?
A set of server controls included with ASP.NET that test user input in HTML and Web server controls for programmer-defined requirements. Validation controls perform input checking in server code. If the user is working with a browser that supports DHTML, the validation controls can also perform validation ("EnableClientScript" property set to true/false) using client script.
The following validation controls are available in asp.net:
RequiredFieldValidator Control, CompareValidator Control, RangeValidator Control, RegularExpressionValidator Control, CustomValidator Control, ValidationSummary Control.
51. Which two properties are there on every validation control?
ControlToValidate, ErrorMessage
52. How do you use css in asp.net?
Within the <HEAD> section of an HTML document that will use these styles, add a link to this external CSS style sheet that
follows this form:
<LINK REL="STYLESHEET" TYPE="text/css" HREF="MyStyles.css">
MyStyles.css is the name of your external CSS style sheet.
53. How do you implement postback with a text box? What is postback and usestate?
Make AutoPostBack property to true
54. How can you debug an ASP page, without touching the code?
55. What is SQL injection?
An SQL injection attack "injects" or manipulates SQL code by adding unexpected SQL to a query.
Many web pages take parameters from web user, and make SQL query to the database. Take for instance when a user login, web page that user name and password and make SQL query to the database to check if a user has valid name and password.
Username: ' or 1=1 ---
Password: [Empty]
This would execute the following query against the users table:
select count(*) from users where userName='' or 1=1 --' and userPass=''
56. How can u handle Exceptions in Asp.Net?
57. How can u handle Un Managed Code Exceptions in ASP.Net?
58. Asp.net - How to find last error which occurred?
A: Server.GetLastError();
[C#]
Exception LastError;
String ErrMessage;
LastError = Server.GetLastError();
if (LastError != null)
ErrMessage = LastError.Message;
else
ErrMessage = "No Errors";
Response.Write("Last Error = " + ErrMessage);
59. How to do Caching in ASP?
A: <%@ OutputCache Duration="60" VaryByParam="None" %>
VaryByParam value Description
none One version of page cached (only raw GET)
* n versions of page cached based on query string and/or POST body
v1 n versions of page cached based on value of v1 variable in query string or POST body
v1;v2 n versions of page cached based on value of v1 and v2 variables in query string or POST body
60. <%@ OutputCache Duration="60" VaryByParam="none" %>
<%@ OutputCache Duration="60" VaryByParam="*" %>
<%@ OutputCache Duration="60" VaryByParam="name;age" %>
The OutputCache directive supports several other cache varying options
· VaryByHeader - maintain separate cache entry for header string changes (UserAgent, UserLanguage, etc.)
· VaryByControl - for user controls, maintain separate cache entry for properties of a user control
· VaryByCustom - can specify separate cache entries for browser types and version or provide a custom GetVaryByCustomString method in HttpApplicationderived class
61. What is the Global ASA(X) File?
62. Any alternative to avoid name collisions other then Namespaces.
A scenario that two namespaces named N1 and N2 are there both having the same class say A. now in another class i ve written
using N1;using N2;
and i am instantiating class A in this class. Then how will u avoid name collisions?
Ans: using alias
Eg: using MyAlias = MyCompany.Proj.Nested;
63. Which is the namespace used to write error message in event Log File?
64. What are the page level transaction and class level transaction?
65. What are different transaction options?
66. What is the namespace for encryption?
67. What is the difference between application and cache variables?
68. What is the difference between control and component?
69. You ve defined one page_load event in aspx page and same page_load event in code behind how will prog run?
70. Where would you use an IHttpModule, and what are the limitations of any approach you might take in implementing one?
71. Can you edit data in the Repeater control? Which template must you provide, in order to display data in a Repeater control? How can you provide an alternating color scheme in a Repeater control? What property must you set, and what method must you call in your code, in order to bind the data from some data source to the Repeater control?
72. What is the use of web.config? Difference between machine.config and Web.config?
ASP.NET configuration files are XML-based text files--each named web.config--that can appear in any directory on an ASP.NET
Web application server. Each web.config file applies configuration settings to the directory it is located in and to all
virtual child directories beneath it. Settings in child directories can optionally override or modify settings specified in
parent directories. The root configuration file--WinNT\Microsoft.NET\Framework\<version>\config\machine.config--provides
default configuration settings for the entire machine. ASP.NET configures IIS to prevent direct browser access to web.config
files to ensure that their values cannot become public (attempts to access them will cause ASP.NET to return 403: Access
Forbidden).
At run time ASP.NET uses these web.config configuration files to hierarchically compute a unique collection of settings for
each incoming URL target request (these settings are calculated only once and then cached across subsequent requests; ASP.NET
automatically watches for file changes and will invalidate the cache if any of the configuration files change).
http://samples.gotdotnet.com/quickstart/aspplus/doc/configformat.aspx
73. What is the use of sessionstate tag in the web.config file?
Configuring session state: Session state features can be configured via the <sessionState> section in a web.config file. To double the default timeout of 20 minutes, you can add the following to the web.config file of an application:
<sessionState
timeout="40"
/>
74. What are the different modes for the sessionstates in the web.config file?
Off Indicates that session state is not enabled.
Inproc Indicates that session state is stored locally.
StateServer Indicates that session state is stored on a remote server.
SQLServer Indicates that session state is stored on the SQL Server.
75. What is smart navigation?
When a page is requested by an Internet Explorer 5 browser, or later, smart navigation enhances the user's experience of the page by performing the following:
· eliminating the flash caused by navigation.
· persisting the scroll position when moving from page to page.
· persisting element focus between navigations.
· retaining only the last page state in the browser's history.
Smart navigation is best used with ASP.NET pages that require frequent postbacks but with visual content that does not change dramatically on return. Consider this carefully when deciding whether to set this property to true.
Set the SmartNavigation attribute to true in the @ Page directive in the .aspx file. When the page is requested, the dynamically generated class sets this property.
76. In what order do the events of an ASPX page execute. As a developer is it important to undertsand these events?
77. How would you get ASP.NET running in Apache web servers - why would you even do this?
78. What tags do you need to add within the asp:datagrid tags to bind columns manually
79. What base class do all Web Forms inherit from?
System.Web.UI.Page
80. How can we create pie chart in asp.net?
81. Is it possible for me to change my aspx file extension to some other name?
Yes.
Open IIS->Default Website -> Properties
Select HomeDirectory tab
Click on configuration button
Click on add. Enter aspnet_isapi details (C:\WINDOWS\Microsoft.NET\Framework\v1.0.3705\aspnet_isapi.dll | GET,HEAD,POST,DEBUG)
Open machine.config(C:\WINDOWS\Microsoft.NET\Framework\v1.0.3705\CONFIG) & add new extension under <httpHandlers> tag
<add verb="*" path="*.santhosh" type="System.Web.UI.PageHandlerFactory"/>
82. What is AutoEventWireup attribute for ?
What is view state and use of it?
The current property settings of an ASP.NET page and those of any ASP.NET server controls contained within the page. ASP.NET can detect when a form is requested for the first time versus when the form is posted (sent to the server), which allows you to program accordingly.
What are user controls and custom controls?
Custom controls:
A control authored by a user or a third-party software vendor that does not belong to the .NET Framework class library. This is a generic term that includes user controls. A custom server control is used in Web Forms (ASP.NET pages). A custom client control is used in Windows Forms applications.
User Controls:
In ASP.NET: A user-authored server control that enables an ASP.NET page to be re-used as a server control. An ASP.NET user control is authored declaratively and persisted as a text file with an .ascx extension. The ASP.NET page framework compiles a user control on the fly to a class that derives from the System.Web.UI.UserControl class.
What are the validation controls?
A set of server controls included with ASP.NET that test user input in HTML and Web server controls for programmer-defined requirements. Validation controls perform input checking in server code. If the user is working with a browser that supports DHTML, the validation controls can also perform validation using client script.
What's the difference between Response.Write() andResponse.Output.Write()?
The latter one allows you to write formattedoutput.
What methods are fired during the page load? Init()
When the page is instantiated, Load() - when the page is loaded into server memory,PreRender () - the brief moment before the page is displayed to the user as HTML, Unload() - when page finishes loading.
Where does the Web page belong in the .NET Framework class hierarchy?
System.Web.UI.Page
Where do you store the information about the user's locale?
System.Web.UI.Page.Culture
What's the difference between Codebehind="MyCode.aspx.cs" and Src="MyCode.aspx.cs"?
CodeBehind is relevant to Visual Studio.NET only.
What's a bubbled event?
When you have a complex control, likeDataGrid, writing an event processing routine for each object (cell, button,row, etc.) is quite tedious. The controls can bubble up their eventhandlers, allowing the main DataGrid event handler to take care of its constituents.
Suppose you want a certain ASP.NET function executed on MouseOver over a certain button.
Where do you add an event handler?
It's the Attributesproperty, the Add function inside that property.
e.g. btnSubmit.Attributes.Add("onMouseOver","someClientCode();")
What data type does the RangeValidator control support?
Integer,String and Date.
What are the different types of caching?
Caching is a technique widely used in computing to increase performance by keeping frequently accessed or expensive data in memory. In context of web application, caching is used to retain the pages or data across HTTP requests and reuse them without the expense of recreating them.ASP.NET has 3 kinds of caching strategiesOutput CachingFragment CachingData
The current property settings of an ASP.NET page and those of any ASP.NET server controls contained within the page. ASP.NET can detect when a form is requested for the first time versus when the form is posted (sent to the server), which allows you to program accordingly.
What are user controls and custom controls?
Custom controls:
A control authored by a user or a third-party software vendor that does not belong to the .NET Framework class library. This is a generic term that includes user controls. A custom server control is used in Web Forms (ASP.NET pages). A custom client control is used in Windows Forms applications.
User Controls:
In ASP.NET: A user-authored server control that enables an ASP.NET page to be re-used as a server control. An ASP.NET user control is authored declaratively and persisted as a text file with an .ascx extension. The ASP.NET page framework compiles a user control on the fly to a class that derives from the System.Web.UI.UserControl class.
What are the validation controls?
A set of server controls included with ASP.NET that test user input in HTML and Web server controls for programmer-defined requirements. Validation controls perform input checking in server code. If the user is working with a browser that supports DHTML, the validation controls can also perform validation using client script.
What's the difference between Response.Write() andResponse.Output.Write()?
The latter one allows you to write formattedoutput.
What methods are fired during the page load? Init()
When the page is instantiated, Load() - when the page is loaded into server memory,PreRender () - the brief moment before the page is displayed to the user as HTML, Unload() - when page finishes loading.
Where does the Web page belong in the .NET Framework class hierarchy?
System.Web.UI.Page
Where do you store the information about the user's locale?
System.Web.UI.Page.Culture
What's the difference between Codebehind="MyCode.aspx.cs" and Src="MyCode.aspx.cs"?
CodeBehind is relevant to Visual Studio.NET only.
What's a bubbled event?
When you have a complex control, likeDataGrid, writing an event processing routine for each object (cell, button,row, etc.) is quite tedious. The controls can bubble up their eventhandlers, allowing the main DataGrid event handler to take care of its constituents.
Suppose you want a certain ASP.NET function executed on MouseOver over a certain button.
Where do you add an event handler?
It's the Attributesproperty, the Add function inside that property.
e.g. btnSubmit.Attributes.Add("onMouseOver","someClientCode();")
What data type does the RangeValidator control support?
Integer,String and Date.
What are the different types of caching?
Caching is a technique widely used in computing to increase performance by keeping frequently accessed or expensive data in memory. In context of web application, caching is used to retain the pages or data across HTTP requests and reuse them without the expense of recreating them.ASP.NET has 3 kinds of caching strategiesOutput CachingFragment CachingData
CachingOutput Caching: Caches the dynamic output generated by a request. Some times
it is useful to cache the output of a website even for a minute, which will
result in a better performance. For caching the whole page the page should have
OutputCache directive.<%@ OutputCache Duration="60"
VaryByParam="state" %>
Fragment Caching: Caches the portion of the page generated by the request.
Some times it is not practical to cache the entire page, in such cases we can
cache a portion of page<%@ OutputCache Duration="120"
VaryByParam="CategoryID;SelectedID"%>
Data Caching: Caches the objects
programmatically. For data caching asp.net provides a cache object for eg:
cache["States"] = dsStates;
What do you mean by authentication and authorization?
Authentication is the process of validating a user on the credentials (username and password) and authorization performs after authentication. After Authentication a user will be verified for performing the various tasks, It access is limited it is known as authorization
What do you mean by authentication and authorization?
Authentication is the process of validating a user on the credentials (username and password) and authorization performs after authentication. After Authentication a user will be verified for performing the various tasks, It access is limited it is known as authorization
Nice interview questions found in a
Job Posting
Architecture - client requires
at least rudimentary skills in these areas.
What is SOA? Benefits? SOA principles for WS?
Name standard architecture patterns you know
Design Patterns
What is a singleton class? Where one should use it and what is the advantage of using it?
What kind of UML diagrams do you know?
Explain how garbage collection works in .NET. How to properly release object resources?
How to expose COM dll to be reused in .NET?
How to use .NET dll in ASP 1.1?
Web Services - client requires expertise in these areas.
How to convert a class into a Web Service? Attributes to use?
When and how do you implement the asynchronous WS call? Does .NET have a support for this?
What is the transport protocol you use to call a Web service?
What does WSDL stand for?
How you make your WS discoverable?
What is WSE? What does it include?
AD- client requires at least rudimentary skills in these areas.
What is Active Directory?
What is Global Catalog?
User display name = Nick Kazanskiy, Container=users in OU=DolUsers. server= usatrame5101.staging.dmz.dtt. Write a LDAP connection string.
COM+ - client requires solid skills in these areas.
Explain transaction atomicity.
Explain consistency.
Explain integrity.
Explain durability.
Explain object pooling.
Explain JIT activation.
Explain role-based security
Explain queued components.
Explain loosely coupled events
Define scalability.
Define reliability.
Define availability.
Define security.
Define manageability.
Which namespace do the classes, allowing you to support COM functionality, are located?
How do you make a NET component talk to a COM component?.
XML- client requires solid skills in these areas.
What is XPath?
What is XSLT? And what's its use?
How to load XML in .NET? What methods and objects could be used?
How to search in XML using XPath if the namespace is defined in XML?
SQL Server – client requires some knowledge of these skills as it relates to development.
What are benefits of using views?
What kind of triggers exists?
What are restrictions on User defined functions?
What are partition views?
What does referential integrity (also called relational integrity) prevent?
What is denormalization and when would you go for it?
What's the difference between a primary key and a unique key?
Define candidate key, alternate key, and composite key.
What are defaults? Is there a column to which a default can't be bound?
What's the difference between DELETE TABLE and TRUNCATE TABLE commands?
What is an index? What are the types of indexes? How many clustered indexes can be created on a table? I create a separate index on each column of a table. what are the advantages and disadvantages of this approach?
What is replication? How many different types of replication exist?
ASP.NET - client requires solid skills in these areas.
Explain the differences between Server-side and Client-side code?
What type of code (server or client) is found in a Code-Behind class?
Should user input data validation occur server-side or client-side? Why?
What is the difference between Server.Transfer and Response.Redirect? Why would I choose one over the other?
http://msdn2.microsoft.com/ru-ru/library/aa332847(VS.71).aspx
http://msdn2.microsoft.com/en-gb/library/t9dwyts4.aspx
What is the Global.asax used for?
What are the Application_Start and Session_Start subroutines used for?
Describe the role of inetinfo.exe, aspnet_isapi.dll andaspnet_wp.exe in the page loading process.
What’s the difference between Response.Write() and Response.Output.Write()?
What methods are fired during the page load?
What is ViewState?
What is the lifespan for items stored in ViewState?
What does the "EnableViewState" property do? Why would I want it on or off?
What are the different types of Session state management options available with ASP.NET?
When during the page processing cycle is ViewState available?
What is assembly? What are assembly components?
C#- client requires solid skills in these areas.
I was trying to use an “out int” parameter in one of my functions. How should I declare the variable that I am passing to it?
If I return out of a try/finally in C#, does the code in the finally-clause run? Describe how the try/catch block works and in what sequence the exceptions need to be processed.
What statement is used to synchronize the code execution?
What is the difference between a struct and a class in C#?
http://msdn2.microsoft.com/en-us/library/ah19swz4.aspx
Is it possible to have different access modifiers on the get/set methods of a property?
Is there a way to force garbage collection?
How do you convert a string into an integer in .NET?
OOP
What is difference between Interface and Inheritance
http://msdn2.microsoft.com/en-us/library/87d83y5b.aspx
http://msdn2.microsoft.com/en-us/library/ms173149.aspx
Does .Net support Multiple Inheritance ? If not, what are alternatives?
Can you have private abstract methods?
What are the methods of object you should overwrite?
What is binary search algorithm?
What is SOA? Benefits? SOA principles for WS?
Name standard architecture patterns you know
Design Patterns
What is a singleton class? Where one should use it and what is the advantage of using it?
What kind of UML diagrams do you know?
Explain how garbage collection works in .NET. How to properly release object resources?
How to expose COM dll to be reused in .NET?
How to use .NET dll in ASP 1.1?
Web Services - client requires expertise in these areas.
How to convert a class into a Web Service? Attributes to use?
When and how do you implement the asynchronous WS call? Does .NET have a support for this?
What is the transport protocol you use to call a Web service?
What does WSDL stand for?
How you make your WS discoverable?
What is WSE? What does it include?
AD- client requires at least rudimentary skills in these areas.
What is Active Directory?
What is Global Catalog?
User display name = Nick Kazanskiy, Container=users in OU=DolUsers. server= usatrame5101.staging.dmz.dtt. Write a LDAP connection string.
COM+ - client requires solid skills in these areas.
Explain transaction atomicity.
Explain consistency.
Explain integrity.
Explain durability.
Explain object pooling.
Explain JIT activation.
Explain role-based security
Explain queued components.
Explain loosely coupled events
Define scalability.
Define reliability.
Define availability.
Define security.
Define manageability.
Which namespace do the classes, allowing you to support COM functionality, are located?
How do you make a NET component talk to a COM component?.
XML- client requires solid skills in these areas.
What is XPath?
What is XSLT? And what's its use?
How to load XML in .NET? What methods and objects could be used?
How to search in XML using XPath if the namespace is defined in XML?
SQL Server – client requires some knowledge of these skills as it relates to development.
What are benefits of using views?
What kind of triggers exists?
What are restrictions on User defined functions?
What are partition views?
What does referential integrity (also called relational integrity) prevent?
What is denormalization and when would you go for it?
What's the difference between a primary key and a unique key?
Define candidate key, alternate key, and composite key.
What are defaults? Is there a column to which a default can't be bound?
What's the difference between DELETE TABLE and TRUNCATE TABLE commands?
What is an index? What are the types of indexes? How many clustered indexes can be created on a table? I create a separate index on each column of a table. what are the advantages and disadvantages of this approach?
What is replication? How many different types of replication exist?
ASP.NET - client requires solid skills in these areas.
Explain the differences between Server-side and Client-side code?
What type of code (server or client) is found in a Code-Behind class?
Should user input data validation occur server-side or client-side? Why?
What is the difference between Server.Transfer and Response.Redirect? Why would I choose one over the other?
http://msdn2.microsoft.com/ru-ru/library/aa332847(VS.71).aspx
http://msdn2.microsoft.com/en-gb/library/t9dwyts4.aspx
What is the Global.asax used for?
What are the Application_Start and Session_Start subroutines used for?
Describe the role of inetinfo.exe, aspnet_isapi.dll andaspnet_wp.exe in the page loading process.
What’s the difference between Response.Write() and Response.Output.Write()?
What methods are fired during the page load?
What is ViewState?
What is the lifespan for items stored in ViewState?
What does the "EnableViewState" property do? Why would I want it on or off?
What are the different types of Session state management options available with ASP.NET?
When during the page processing cycle is ViewState available?
What is assembly? What are assembly components?
C#- client requires solid skills in these areas.
I was trying to use an “out int” parameter in one of my functions. How should I declare the variable that I am passing to it?
If I return out of a try/finally in C#, does the code in the finally-clause run? Describe how the try/catch block works and in what sequence the exceptions need to be processed.
What statement is used to synchronize the code execution?
What is the difference between a struct and a class in C#?
http://msdn2.microsoft.com/en-us/library/ah19swz4.aspx
Is it possible to have different access modifiers on the get/set methods of a property?
Is there a way to force garbage collection?
How do you convert a string into an integer in .NET?
OOP
What is difference between Interface and Inheritance
http://msdn2.microsoft.com/en-us/library/87d83y5b.aspx
http://msdn2.microsoft.com/en-us/library/ms173149.aspx
Does .Net support Multiple Inheritance ? If not, what are alternatives?
Can you have private abstract methods?
What are the methods of object you should overwrite?
What is binary search algorithm?
- Can you explain
the difference between an ADO.NET ...
- What is the
Global.asax used for?
- What are the
Application_Start and Session_Start s...
- Can you explain
what inheritance is and an example...
- Whats an assembly?
- Describe the
difference between inline and code be...
- Explain what a
diffgram is, and a good use for one...
- Whats MSIL, and
why should my developers need an a...
- Which method do
you invoke on the DataAdapter cont...
- Can you edit
data in the Repeater control?
- Which template
must you provide, in order to displ...
- How can you
provide an alternating color scheme in...
- What property
must you set, and what method must y...
- In DataGrid, is
it possible to add rows one by one...
- Whats the use
of @ Register directives ?
- What is the
difference between excute query and ex...
- What is the
Subquery ?
- ASSEMBLIES
- Explain
Assemblies?,Difference between Panel and G...
- What is
difference between Authentication and Auth...
- what is .net
frame work?
- How to create a
package for web application with c...
- What are the
different types of Session state mana...
- What does the
"EnableViewState" property do? Why ...
- What is the
lifespan for items stored in ViewState...
- What is
ViewState?
- To test a Web
service you must create a Windows ap...
- Which control
would you use if you needed to make ...
- Which property
on a Combo Box do you set with a co...
- Which
authentication mechanism allows you to conne...
- What is the
maximum number of cookies that can be ...
·
Learn the
latest, most Exclusive ASP.NET 2.0 Interview Questions & get selected wherever
you want. Read http://aspnetinfo.googlepages.com
·
How do I send a new page to the user?
How do I pass values between pages?
How do I pass data to a user control?
How do I pass data back to the page from a user control?
How do I pass a value between two user controls?
How do I pass a value between an ASP.NET 2.0 page and its master page?
How do I store global variables?
How do I store a value between PostBacks?
How do I loop through all the controls in a form?
How do I store sensitive data securely?
Why don't any controls show up on my page at run time?
What is a Server Control?
What's the difference between HTML controls and Web controls?
What's the difference between User Controls and Custom Controls?
How do I save the state of my controls between postbacks?
How do I set the focus to a particular control on my page?
How do I send the output of a Web control via e-mail?
How do I pass values between pages?
How do I pass data to a user control?
How do I pass data back to the page from a user control?
How do I pass a value between two user controls?
How do I pass a value between an ASP.NET 2.0 page and its master page?
How do I store global variables?
How do I store a value between PostBacks?
How do I loop through all the controls in a form?
How do I store sensitive data securely?
Why don't any controls show up on my page at run time?
What is a Server Control?
What's the difference between HTML controls and Web controls?
What's the difference between User Controls and Custom Controls?
How do I save the state of my controls between postbacks?
How do I set the focus to a particular control on my page?
How do I send the output of a Web control via e-mail?
