11) What is the used of "isPostBack" property?

The "IsPostBack" property of page object is used to check that the page is posted back or not.

12) How do you identify that the page is PostBack?

There is a property named "IsPostBack" property in Post object, which can be checked to know that the page is posted back.

13) What is the parent class of all web server control?

System.Web.UI.Control class

14) What is the difference between ASP.NET Webforms and ASP.NET MVC?

ASP.NET Webforms uses the page controller approach for rendering layout. In this approach, every page has its controller.

On the other hand, ASP.NET MVC uses the Front Controller approach. In this approach, there is a common controller for all pages.

15) What is the difference between the GET method () and POST method ()?

16) What is the difference between session object and application object?

The session object is used to maintain the session of each user. A session id is generated if a user enters in the application and when the user leaves the application, the session id is automatically deleted.

On the other hand, the application object is used to store the information and access variables from any page in the application.

17) What is the difference between trace and debug?

Debug class is used to debug builds. Trace class is used for both debug and release builds.

18) What is the difference between client-side and server-side validations in WebPages?

The client-side validation happens at the client's side with the help of JavaScript and VBScript. This validation has occurred before the Web page is sent to the server.

The server-side validation happens at the server side.

19) What is the difference between file-based dependency and key-based dependency?

File-based dependency: File-based dependency facilitates you to save the dependency on a file in a disk.

Key-based dependency: In key-based dependency, you depend on another cached item.

20) What is the difference between globalization and localization?

Globalization: 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.

Localization: In localization, you try to configure a Web application so that it can be supported for a specific language or locale.

21) What is the difference between a page theme and a global theme?

Page Theme: The page theme is applied to particular web pages of the project. It is stored inside a subfolder of the App_Themes folder.

Global Theme: The Global theme is applied to all the web applications on the web server. It is stored inside the Themes folder on a Web server.

22) What is the difference between early binding and late binding?

Early Binding: In early binding, a non-virtual method is called which is decided at a compile time.

Late Binding: In late binding, a virtual method is called which is decided at runtime.

23) What is the difference between server-side scripting and client-side scripting?

Server-side scripting: In server-side scripting, all the script are executed by the server and interpreted as needed.

Client-side scripting: In client-side scripting, the script will be executed immediately in the browser such as form field validation, email validation, etc.

The client-side scripting is usually carried out in VBScript or JavaScript.

24) How to sign out from forms authentication?

FormsAuthentication.Signout() method is used to sign out from forms authentication.

25) How to display validation messages in one control?

By the help of ValidationSummary control, we can display all validation messages in one control.

26) What is the difference between authentication and authorization?

Authentication is a process of identifying user whereas authorization is used to check the access rights of an identified user.

27) Which object encapsulates state or data of a user?

Session object.

28) What is ViewState?

ViewState is a feature of ASP.NET to store the values of a page before it is submitted to the server. After posting the page, data from is ViewState is restored.

29) What is ViewState information stored?

It is stored in HTML hidden field.

30) What are the differences between the Response.Write() and Response.Output.Write()?

Response.Write() is used for normal output whereas Response.Output.Write() is used for formatted output.

31) Define the types of configuration files.

There are two types of configuration files:

• Application Level config = Web.config.
• Machine Level config = Machine.config.

32) What is the difference between Web config and Machine config files?

Web config file is specific to web application whereas Machine config file is specific to machine or server.

There can be multiple web config files in an application but only one machine config file.

33) What is MVC?

MVC stands for Model View Controller. It is a design pattern that is used to separate business logic and presentation logic. It is used to develop the highly customized application.

The Model represents data, View represents presentation and controller acts as an interface between Model and View.

34) What are the built-in objects in ASP.NET?

The major built-in objects are given below:

• Application
• Session
• Context
• Request
• Response
• Server
• Trace

35) What do you mean by Role-based security?

Role-based security is used in almost all organization, and the Role-based security assigns 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 can do only what he is permitted to do on the system.

36) What is a cookie?

A Cookie is a small piece of information which is stored at the client side. There are two types of cookie:

• Session/Temporary Cookie: valid for a single session
• Persistent Cookie: valid for multiple session

37) What is the default timeout for a cookie?

30 minutes.

38) How would you turn off cookies on a page of a website?

You have to follow the procedures given below:

• Use 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.

39) Which protocol is used to call web service?

HTTP protocol.

40) What is the file extension of web service?

The File extension of web service is .asmx.

41) What are the HTML server controls in ASP.NET?

• HTML server controls are just like HTML elements that we use on the HTML pages.
• HTML server controls are used to expose properties and events for use.
• To make these controls programmatically accessible, we specify that the HTML controls act as a server control by adding the runat="server" attribute.

42) What is the use of Global.asax file?

The Global.asax file is used to execute the application-level events and sets application-level variables.

43) What is event bubbling?

When child control sends 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.