Popular Interview Questions for Senior .NET ✅Developer

Preparing for a senior .NET developer interview involves covering a broad range of topics, including advanced C# programming, .NET framework details, architecture and design patterns, cloud services integration, and more.

Here are some popular interview questions for senior .NET developers:

1 C# Fundamentals:

• Explain the differences between ref and out parameters.
• What are delegates and events? Provide an example of each.

• Discuss the various access modifiers (public, private, protected, internal) and their scope.

  2 Object-Oriented Programming (OOP):

• What is polymorphism? How is it achieved in C#?

• Describe the SOLID principles. How do they apply to C# development?

• Explain the differences between abstract classes and interfaces. When would you use one over the other?

  3 ASP.NET and Web Development:

• What are the different session state management options in ASP.NET?
• Explain the role of MVC (Model-View-Controller) architecture in ASP.NET applications.
• How does Web API differ from MVC? When would you choose one over the other?

4 Database and Entity Framework:

• What is Entity Framework, and how does it work with databases?
• Discuss the advantages of using LINQ over traditional SQL queries.

• How do you handle concurrency and transactions in Entity Framework?

  5 Testing and Debugging:

• What testing frameworks have you used with .NET applications?

• How would you debug a performance issue in a .NET application?

• What is unit testing, and why is it important in software development?

  6 Advanced Topics:

• Explain dependency injection and its benefits. How is it implemented in .NET?

• Discuss asynchronous programming in C#. When would you use async and await?

• What are the different types of design patterns you’ve implemented in .NET projects?

  7 Cloud and Microservices:

• Have you integrated .NET applications with cloud services like Azure? Describe your experience.

• What are microservices? How would you design a .NET application using microservices architecture?

  8 General Development Practices:

• How do you handle version control in .NET projects?
• Describe your approach to code reviews and maintaining code quality.
• How do you stay updated with the latest .NET technologies and best practices?

Preparing for these questions involves not only understanding the concepts but also being able to articulate your experiences and problem-solving skills effectively. Tailor your answers to reflect your practical experience and how you’ve applied these concepts in real-world scenarios.

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