Asp.net Interview questions and answers

                       Asp.net Interview questions and answers

• 1.  Does Main() always have to be public?

       -->    No.

• 2.How do you turn off SessionState in the web.config file?

       -->  just simply put following code to disable SessionState.

             <httpModules>

             <remove name=”Session” />

             </httpModules>

• 3. short-circuited operators: 

           -->  short-circuited operators

In C#, "&" and "|" operators evaluate both boolean expressions in the statement.

However, the "&&" operator only evaluates the first Boolean if false ,and the "||" operator only evaluates the first Boolean if true.

This technique prevents the execution of the second expression if unnecessary.

So,To achieve performance in your application.

//Don't use this:

if (_username ==”” & _password == “”)

{

…

}

//Make a practice of this in your whole application:

if (_username == “” && _password == “”)

{

…

}

• 4. Use of TempData, (ViewData , ViewBag), Hiddenfield and query string.

  --->   TempData are used when we want to pass session variable or data from 
           controller to controller.
 --->  ViewData & ViewBag are used when  want to pass data from controller to                  view.
 --->  Hidden fields , query string are used when  want to pass data from view to                controller.

         C------->C  = TempData
         C------->V  = ViewData,ViewBag
         V------->C  = HiddenFields,query strings