ASP.NET Interview Questions and Answers

Why do you use the App_Code folder in ASP.NET?

Ans- The App_Code folder is automatically present in the project. It stores the files, such as classes, typed data set, text files, and reports. If this folder is not available in the application, you can add this folder. One of the important features of the App_Code folder is that only one dll is created for the complete folder, irrespective of how many files it contains.

What is an ASP.NET Web Form?

Ans- ASP.NET Web forms are designed to use controls and features that are almost as powerful as the ones used with Windows forms, and so they are called as Web forms. The Web form uses a server-side object model that allows you to create functional controls, which are executed on the server and are rendered as HTML on the client. The attribute, runat="server", associated with a server control indicates that the Web form must be processed on the server.


Define a multilingual Web site.

Ans- A multilingual Web site serves content in a number of languages. It contains multiple copies for its content and other resources, such as date and time, in different languages.


What is the difference between a default skin and a named skin?

Ans- The default skin is applied to all the Web server controls in a Web form, which are of similar type, and it does not provide a Skin ID attribute. The named skin provides a Skin ID attribute and users have to set the Skin ID property to apply it.


What is actually returned from server to the browser when a browser requests an .aspx file and the file is displayed?
Ans- When a browser requests an .aspx file then the server returns a response, which is rendered into a HTML string


How can you register a custom server control to a Web page?

Ans- You can register a custom server control to a Web page using the @Register directive.


What is ViewState?

Ans- The ViewState is a feature used by ASP.NET Web page to store the value of a page and its controls just before posting the page. Once the page is posted, the first task by the page processing is to restore the ViewState to get the values of the controls.