Interview Questions and Answers

Last updated on Feb 06, 2023
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As a new age web development platform, ASP.NET includes a programming model, a software infrastructure and a vast number of services required to create web-based applications for both desktops as well as mobile devices. This framework also allows programmers to build dynamic websites and web services. It operates on top of the HTTP protocol and utilizes commands and policies of HTTP to set browser-to-sever bilateral cooperation and communication. The application codes for ASP.NET can be written in any of the following languages, which are C#, JScript, j# and Visual Basic.Net.

You will get the insight of ASP.NET through interview questions professionals as well as for freshers.

Most Frequently Asked Interview Questions

Here in this article, we will be listing frequently asked Interview Questions and Answers with the belief that they will be helpful for you to gain higher marks. Also, to let you know that this article has been written under the guidance of industry professionals and covered all the current competencies.

Q1. Explain the difference between ASP & ASP.NET.

The prime difference between these two is that ASP is interpreted platform as scripts are being used, whereas ASP.NET is a compiled platform because of its pages using .NET languages. All the ASP.NET pages are MSIL (Microsoft Intermediate Language) compiled.

Q2. What is IIS? Why is it used?

Internet Information Server or IIS is developed by Microsoft with its own operating system. It is used to execute web page scripts. It works in between ASP.NET engine and browser to process chrome requests and responses are submitted back.

Q3. Explain the ASP.NET page life cycle.

An ASP.NET page goes through a series of stages in the life cycle as following,


Page Request => Start => Initialization => Load =>Postback Event Handling => Rendering => Unload

Q4. 4. What’s the difference between ASP.NET Web Forms and ASP.NET MVC?

Both ASP.NET Web Forms and MVC are tolls with different strengths and workability. Web Forms are used to create web apps with ASP.NET and utilize designer and server controls to design a form with a point and click interface, whereas VMS is used to separate as web app into data, actions and display.

Q5. Explain the ASP.NET session state modes.

There are five primary session state modes present in ASP.NET.

  • InProc Mode – Stores session state in the web server memory
  • StateServer Mode – Stores session in ASP.NET state service
  • SQLServer Mode – Store the session state in a SQL database
  • Custom Mode – Developers can specify the storage provider here
  • Off Mode – Completely disables the session state
Q6. What’s the difference between Response .Redirect and Server.Transfer?

Server.Transfer sends information from one web request to another on the server side, But, Response.Redirect sends an HTTP 302 message to the browser and implements a redirect in the browser.

Q7. Mention few ASP.NET validators.

Here are the few most used ASP.NET validators by developers:

  • Required Field Validator
  • Range Validator
  • Compare Validator
  • Summary Validator
  • Regular Expression Validator
  • Custom Validator
Q8. What is an ASP.NET validator? And, mention its types.

An ASP.NET validator controls validate the user input data. Whenever the user shares an input, it must validate them before sending it across various layers of the application.


There are two types of validation used in ASP.NET:

  • Client-side validation
  • Server-side validation
Q9. What is ViewState?

It is used to retain the state of the server-side objects between page postbacks. After the page postback, it is stored in a hidden field on the page at the client side. It is transported to both client and server side, and not stored on the server or any other external source.

Q10. Explain cashing in ASP.NET.

The caching technique is used to increase performance level in ASP.NET by keeping frequently accesses files or data in memory. The request for a cached data/file will be directly obtained from the cache instead of the actual location of that data or file.


ASP.NET has three types of caching:

  • Data Caching
  • Fragment Caching
  • Output Caching

Development History of ASP.NET

The platform was first released in 2002 by Microsoft with a version 1.0 of the .NET framework as a successor of Microsoft’s ASP (Active Server Pages) technology. It can operate on Microsoft Windows, macOS and Linux.

Latest Version

The most recent stable version of ASP.NET, version 4.7.1, was released in October 2017 with improved accessibility, value tuple types serialization and SHA-2 support feature additions.

With its language independence and countless other user benefiting features, ASP.NET is a popular platform for businesses, creating a massive demand for skilled individuals in this niche, Here in below; we are mentioning a set of top ASP.NET interview questions and answers prepared by experts for interview aspirants.


  • Less coding required with ASP.NET framework technology to build large web applications.
  • It’s a language independent platform, which means developers can use any programming languages best suited for their application.
  • It offers better performance with native optimization, early binding, and just-in-time compilation.
  • It’s pure server-side technology, which means the code executes on the server before it is sent to the browser.
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