1)Code for updating the database by entering the data into textboxes in
aspx form?

Ans:There are several ways to do so. If you are using a dataset, you can 
write changes to the dataset and then call the data adapter to send 
changes from the dataset to the database.

Ans2:This walkthrough illustrates how to create a Web Forms page that reads 
and writes data to a database using SQL statements. For the walkthrough,
 you will work with the Categories table of the SQL Server Northwind 
database. In the page, you can select a record, edit it, and then save 
it to the database.

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2)How do you handle errors in stored procedures?

 Ans:http://articles.techrepublic.com.com/5100-10878_11-1045786.html

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3)How did you implemented classes in your project?

Ans:

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4)How did you implemented interfaces in your project?

Ans:
using ThirdPartyLibrary; // The only using statement
namespace Interfaces
{
   public interface IConnection
   {
       ...
       BugFactory BugFactory();
   }
}

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5)How did you call javascript from c#?

Ans:<SCRIPT LANGUAGE="JavaScript" src="javascript/projectJS.js">

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6)Differences between 1.1 and 2.0 versions of .net?

Ans: Some Importent New Features added in .net2.0

(a) Master Pages
(b) PreCompilation
(c) Sharing code in the application
(d) Themes and Skins
(Breaf Descriptin visit "http://www.geekinterview.com/question_details/33965")
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7)Caching types?Ans:3 types of catching:
1.data caching
2.output caching
3.fragment caching
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8)Session state modes?

Ans:(1) InProc Mode or InProceess this is the clarification of 
InProc.

(2) SQL Server Mode

(3) StateServer Mode -->StateServer is memory based mode. 

(4) Out of process Mode -->This mode is best used when 
performance is important but you can't guarantee which 
server a user will request an application from.

(5) Off Mode -->Disable Session State.

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9)what is the connection between IIS and client browser?
How do they communicate?

Ans:IIS is a web server. The client browser makes HTTP connections to a server machine, which IIS handles and responds to.

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10)which session statemode u used in your current project?why?

Ans:

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11)How did you handle exceptions in sql server?

Ans:Visit This Site Breaf Answer

"http://challagullainfo.blogspot.com/2010/12/error-handling-in-sqlserver.html"

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12)Two methos with same name in parent and inherited classes. If you create
an objct of child which method will be invoked?

Ans:This is not possible...

suppose you can use this method useing shadows keyword....

after it's invoke parent class function.

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13)Garbage colllector how it works in Background? 

Ans: 

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14)Asp.net page life cycle? Explain briefly?

Ans:Page_Init -- Page Initialization 

 LoadViewState -- View State Loading 

 LoadPostData -- Postback data processing 

 Page_Load -- Page Loading 

 RaisePostDataChangedEvent -- PostBack Change Notification 

 RaisePostBackEvent -- PostBack Event Handling 

 Page_PreRender -- Page Pre Rendering Phase 

 SaveViewState -- View State Saving 

 Page_Render -- Page Rendering 

 Page_UnLoad -- Page Unloading
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15)Asp.net page events?
Ans:

Method
PostBack
Controls

Constructor
Always
All
AddParsedSubObject
Always
All
DeterminePostBackMode
Always
Page
OnInit
Always
All

LoadPageStateFromPersistenceMedium
PostBack
Page
LoadViewState
PostBack
All
ProcessPostData1
PostBack
Page
OnLoad
Always
All

ProcessPostData2
PostBack
Page
RaiseChangedEvents
PostBack
Page
RaisePostBackEvent
PostBack
Page
OnPreRender
Always
All

SaveViewState
Always
All
SavePageStateToPersistenceMedium
Always
Page
Render
Always
All
OnUnload
Always
All

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16)How iis recognize that which web application we are
requesting?

Ans:I guess from the url you are 
requesting. In IIS we have virtual directories pointing to the url's , 
so depending on the url IIS knows which web application you are 
requesting. Ans2:IN IIS While creating Virtual directory
 we can mention framework version and while running framework will 
identify which language from PAGE Directive

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17)How iis recognize that web application is developed in
which language?
Ans:

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18)How iis will use authentication?
Ans:Assuming you have the latest and greatest IIS, you have several choices 
        when working with authentication including: 
        

• IIS NT Challenge Response
  • A good choice if you are on a Windows Network. Can require the use of IE. There is no proxy-server between the browser and the server.
• IIS Basic Authentication
  • Can expose your NT usernames and passwords unless all connections are over SSL.
• A Basic Authentication filter such as AuthentiX
  • Cannot compromise NT accounts. High performance. Large numbers of users. Can validate against ODBC or internal database. Many advanced features.
• Write your own filter
  • Flexible, but resource intensive to build.
• Cookie based authentication with ASP pages
  • Only protects ASP pages. Can be slow. Requires cookies. Cookie-based systems can be susceptible to spoofing.
• Self-Authenticating ISAPI dlls, CGI-scripts using Basic Authentication.
  • Good performance, all content generated though a single URL. Doesn't use conventional directory/file/html format.
• Certificate based
  Secure, but intimidating for webmasters and surfers alike. Requires SSL.(Visit Website "http://www.devguru.com/features/tutorials/authentication/authentication.asp")
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 19)Is it pages will compile in server?
Ans:Yes the code behind compiles on server with the first call and product dlls.
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20)In server pages will compile or execute?
Ans:

For faster execution of ASP.NET applications that are primarily based to be hosted on IIS servers, the aspnet_wp.exe
 comes into picture. This file (aspnet_wp.exe) is actually the ASP.NET 
worker process. The worker process is introduced to actually share the 
load on the IIS, so that application domains and other services may be 
maintained by a single worker process.
The aspnet_wp.exe worker 
process is a part of the Microsoft ASP.NET framework, and it is 
responsible for most of the technical processes in the ASP.NET 
framework. There may be multiple instances of ASP.NET worker process 
running on IIS 6 (a process running as inetinfo.exe), depending 
on multiple application pools. The worker process handles all the 
requests passed to the ASP.NET framework, so we may say that its 
actually the main engine that handles all requests pertaining to ASPNET.
 For example, when a request for an .aspx page is recieved by the IIS 
server, the dll called aspnet_isapi.dll passes this request to the aspnet_wp.exe worker process.   (Visit "http://forums.asp.net/t/1300149.aspx")
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25)What is application?
Ans:the act of bringing something to bear; using it for a particular purpose;
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26)What is view state? Ans:Web Forms pages provide the ViewState property as a built-in structure for automatically 
retaining values between multiple requests for the same page. View state is 
maintained as a hidden field in the page. For more information, see ASP.NET State Management Overview.
You can use view state 
to store your own page-specific values across round trips when the page posts 
back to itself. For example, if your application is maintaining user-specific 
information — that is, information that is used in the page but is not 
necessarily part of any control — you can store it in view state.
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27)Why we use view state?
Ans:

validation controls?

Ans:

The .NET
    Framework provides validation controls that validate user input and display
    appropriate error messages whenever invalid data is encountered in a validation
    control 

Range Validator...to valaidate that a value entered is between some range of values
Required Field Validator..to validate that a field in not left blank
Regular Expression Validator..to validate that the value entered is in a specific format.
Custom Validator...we can define our own validations.
Compare Validator...to compare to values and validate them.
Validation Summary...to display the error message of the validations.

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29)Validation controls are client side or server side? 

Ans: ASP.NET validation controls provide two
 ways of validation: Server-side or Client-side. The nice thing about 
these Validation controls is that they will preform client-side 
validation when it detects the browser is able (unless client-side 
validation has been disabled),thus reducing roundtrips. And it will 
preform server-side where necessary. This client-side/server-side 
detection and validation is done without extra work

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30)How to make raise JavaScript at the page is displaying?
 (which page event will use eg: page_load) ?
Ans:

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31)What is session?

Ans:
A Session refers to all the request that a single client makes to
a server. A session is specific to the user and for each user a new session is
created to track all the request from that user. Every user has a separate
session and separate session variable is associated with that session. In case
of web applications the default time-out value for session variable is 20
minutes, which can be changed as per the requirement. 

More Info:"http://www.roseindia.net/interviewquestions/servlet/session-tracking.shtml" 

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32) Is it necessary to create session object?

Ans: No

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33)What is application object?

Ans:

when user login

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37)Where u will store connection string?

Ans:
u can place the connection string in every .aspx page , but imagine u 
have a project with hundreds of pages , can u imagine the time u will 
spend to open each page and change the ConString , so its always better 
to write it once in the web.config file and then from all the asp.net 
pages to refer to the ConString that is written there .

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38)What is appsettings?

Ans:
The <appSettings> element of a web.config file is a place to
store connection strings, server names, file paths, and other
miscellaneous settings needed by an application to perform work. The
items inside appSettings are items that need to be configurable
depending upon the environment, for instance, any database connection
strings will change as you move your application from a testing and
staging server into production.  

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39)How can i register my assembly in gac?

Ans:

I have created a dll using the Class library in .Net
(Using vb.net).
After that I have associated it with a strong name by
creating a .snk file using sn.exe then i have added this
to my vb.net application using the following tag in
assembly.vb file in my application
<Assembly: AssemblyKeyFileAttribute("sharedDll.snk")>
and the version info as
<Assembly: AssemblyVersion("1.0.1099.0")>

after this i want to configure it to GAC.
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40)What is strong name?

Ans:

A strong name is a .NET assembly name combined with its 
version number and other information to uniquely identify 
the assembly. This allows multiple versions of the same 
assembly to peacefully co-exist in the global assembly 
cache, where shared assemblies are typically stored.

1. Open .net command prompt.
2. Go to the folder contanig DLL.
3. Type sn -k test.snk, you can use any file name instead of test. This will create  test .snk file in that folder.
4. Open the assemblyinfo.cs file of project.
5. Type file path  in this tag [assembly:AssemblyKeyFile@"E:\hemant\practice\HP\bin\Debug\HP.snk")]
6. Build  application, finally your strong name created for your DLL.