ASP.NET MVC Interview Questions with Answers

Working in ASP.NET is one thing and cracking ASP.NET interview is a different ball game. You can be hero in your project who has executed huge projects but if you are not able to answer simple questions like session management , dependency injection  and so on , its difficult to reach to the next level.

ASP.NET Interview question course covers 60 plus most asked questions with answers and code demonstration. After completing this course you should be able to handle ASP.NET interviews more efficiently.  Happy learning , Happy job hunting.

Basic 25 Questions – Part 1.

• Basic Planning of ASP.NET Interview scope

• Question 1 :- What is ASP .NET MVC Core ?

• Question 2 :- Differentiate between ASP .NET Webforms vs MVC vs MVC core ?

• Question 3 :- Explain MVC Architecture ?

• Question 4 :- Why do we have wwwroot folder ?

• Question 5 :- Explain the importance of appsettings.json ?

• Question 6 :- How to read configurations from appsettings.json ?

• Question 7 :- What is dependency injection ?

• Question 8 :- Why do we need dependency injection ?

• Question 9 :- How do we implement dependency injection ?

• Question 10 :- What is the use of Middleware ?

• Question 11 :- How to create a Middle ware ?

• Question 12 :- What does startup.cs file do ?

• Question 13 :- ConfigureServices vs Configure method ?

• Question 14 :- Explain the different Ways of doing DI?

• Question 15 :- Explain Scoped vs Transient vs Singleton ?

• Question 16 :- What is Razor ?

• Question 17 :- How to pass Model data to a View ?

• Question 18 :- What is the use of Strongly typed views ?

• Question 19 :- Explain the concept of ViewModel in MVC ?

• Question 20 :- What is Kestrel Web Server ?

• Question 21 :- Why Kestrel when we have IIS server ?

• Question 22 :- What is the concept of Reverse proxy ?

• Question 23 :- What are cookies ?

• Question 24 :- What is the need session management ?

• Question 25 :- What are the various ways of doing Session management in ASP.NET ?

Session management session and cookies – Part 2.

• Question 26  :- What exactly is a session ?

• Question 27  :- Explain “HTTP is a stateless protocol” ?

• Question 28  :- What are various way of doing session management ?

• Question 29  :- Are sessions enabled by default ?

• Question 30  :- How to enable sessions in MVC core ?

• Question 31  :- Are sessions variables shared(global) between users ?

• Question 32  :- Do session variables use cookies ?

• Question 33  :- What is a cookie ?

• Question 34  :- Explain idle time out in sessions ?

• Question 35  :- What does a Context means in HTTP ?

Session management viewdata,viewbag and viewmodel – Part 3.

• Question 36 :- When should we use viewdata ?

• Question 37 :- How to pass data from controller to view ?

• Question 38 :- In same request can viewdata persist across actions ?

• Question 39 :- ViewData vs ViewBag

• Question 40 :- How does ViewBag work internally?

• Question 41 :- Explain ViewModel?

• Question 42 :-  ViewBag vs ViewModel whats the best practice?

Session management Tempdata – Part 4.

• Question 43  :- Explain tempdata ?

• Question 44  :- Can tempdata persist across action redirects ?

• Question 45  :- How is tempdata different from viewdata ?

• Question 46  :- If tempdata is read is it available for next request ?

• Question 47  :- How to persist tempdata ?

• Question 48  :- What does Keep do in tempdata ?

• Question 49  :- Explain Peek in tempdata ?

• Question 50  :- How is tempdata different from session variables ?

• Question 51  :- If i restart the server does tempdata,session stay ?

• Question 52  :- Is tempdata private to a user ?

• Question 53  :- ViewData vs ViewBag vs Tempdata vs Session variables?

WebAPI and REST – Part 5.

• Question 54  :- What is  WebAPI ?

• Question 55  :- What is the advantage of WebAPI ?

• Question 56  :- Explain REST and Architectural constraints of REST?

• Question 57  :- Can we use  TCPIP protocol with Web API?

• Question 58  :- How WebAPI different from MVC controller ?

• Question 59  :- What is content negotiations in Web API ?

• Question 60  :- WebAPI vs WCF ?

• Question 61  :- WCF REST vs WebAPI REST ?

• Question 62  :- How to return HTTP status codes ?

• Question 63  :- For error which status code is returned ?

• Question 64  :- How did you secure your web API ?

• Question 65  :- How do current JS frameworks work with webAPI ?

JWT Token, Principal, Claim, Roles, Refresh Token, OpenId, OAuth – Part 6.

• Question 66 :- How does  Token based Authentication works?

• Question 67 :- Why is it called JWT Token?

• Question 68 :- Explain the 3 sections of JWT Token?

• Question 69 :- What are Identity and claims ?

• Question 70 :- Differentiate between Authentication VS Authorization ?

• Question 71 :  Claims vs Roles ?

• Question 72 :- Principal vs Identity

• Question 73 :- Can we put critical information in JWT Token ?

• Question 74 :- How do you create JWT Token in MVC ?

• Question 75 :- What HTTP status code do you send for unauthorized access ?

• Question 76 :- Where is Token Checked in ASP.NET MVC ?

• Question 77 :- What is use of Authorize Attribute ?

• Question 78 :- How did you implement JWT token security ?

• Question 79 :- How do we send tokens  from Client Side ?

• Question 80 :- From Javascript, Jquery, Angular etc , How is token passed ?

• Question 81 :- Increase UX experience in Mobile apps to avoid relogin ?

• Question 82 :- What are refresh tokens ?

• Question 83 :- How does Refresh token work ?

• Question 84 :- Access tokens vs Refresh Tokens ?

• Question 85 :- Whose expiry time is more Access tokens or Refresh tokens?

• Question 86 :- Explain revocation of Refresh token  ?

• Question 87 :- How to extract Principal from a Token ?

• Question 88 :- What is the best practice to store tokens at client side?

• Question 89 :- If we store JWT in cookie how to save from XX attacks?

• Question 90 :- What OAUTH  and OpenID ?

• Question 91 :- When should we use what?

• Question 92 :- What is Identity Server?

• Question 93 :- How to achieve single sign on ?

• Question 94 :- What are scopes in Identity Server ?

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