Net Developer Interview Questions

8,177 net developer interview questions shared by candidates

1) What is Encapsulation and Polymorphism 2) Difference between Abstraction and Interface 3) Difference between IQueryable and IEnumerable 4) Explain Extension Methods, Anonymous method, Middleware 5) Write a C# program for reversing of the Whole String. 6) Write a C# program to print index of Array from given Array Of Numbers [2, 7, 11, 15] whose Sum is 9.
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Dot Net Expert

Interviewed at HashedIn by Deloitte

4.1
Oct 3, 2024

1) What is Encapsulation and Polymorphism 2) Difference between Abstraction and Interface 3) Difference between IQueryable and IEnumerable 4) Explain Extension Methods, Anonymous method, Middleware 5) Write a C# program for reversing of the Whole String. 6) Write a C# program to print index of Array from given Array Of Numbers [2, 7, 11, 15] whose Sum is 9.

🟦 .NET / Backend Can you explain the difference between an interface and an abstract class in C#? How do you implement dependency injection in a .NET Core application? How would you handle global exception handling in a Web API? What are some best practices for structuring a RESTful API in ASP.NET Core? Have you worked with Entity Framework or Dapper? When would you use one over the other? What is the role of async/await in .NET? Can you give an example? 🟧 Angular / Frontend How do you manage state in Angular applications? What is the difference between ngOnInit and the constructor in a component? How do you handle form validation in Angular? How do you communicate between components (parent-child and sibling-sibling)? What is the difference between observables and promises? ☁️ Azure / DevOps Which Azure services have you worked with? How would you deploy a .NET app to Azure? How do you manage application secrets in Azure? Have you worked with Azure DevOps pipelines? Can you describe the CI/CD process? 🧠 General / Logical Thinking Given a list of numbers, how would you return only the duplicates? Describe a situation where you had to debug a difficult issue.
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Senior .NET Engineer

Interviewed at EPAM Systems

4
Apr 1, 2025

🟦 .NET / Backend Can you explain the difference between an interface and an abstract class in C#? How do you implement dependency injection in a .NET Core application? How would you handle global exception handling in a Web API? What are some best practices for structuring a RESTful API in ASP.NET Core? Have you worked with Entity Framework or Dapper? When would you use one over the other? What is the role of async/await in .NET? Can you give an example? 🟧 Angular / Frontend How do you manage state in Angular applications? What is the difference between ngOnInit and the constructor in a component? How do you handle form validation in Angular? How do you communicate between components (parent-child and sibling-sibling)? What is the difference between observables and promises? ☁️ Azure / DevOps Which Azure services have you worked with? How would you deploy a .NET app to Azure? How do you manage application secrets in Azure? Have you worked with Azure DevOps pipelines? Can you describe the CI/CD process? 🧠 General / Logical Thinking Given a list of numbers, how would you return only the duplicates? Describe a situation where you had to debug a difficult issue.

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