C# Developer Interview Questions

A C# Developer is a developer with a strong understanding of the C# programming language and experience working with client-server desktop and web applications. C# Developers are responsible for the analysis, design, development, testing and implementation of modern software technologies.

Whether you're a job seeker preparing to be interviewed for the role of C# Developer or an employer preparing to interview candidates for C# Developer position, these C# Developer interview questions will help you prepare yourself for the job interview session.

C# Developer Interview Questions

Below are a list of some skill-based C# Developer interview questions.

1. Are you familiar with the Microsoft .NET Framework?
2. What are some of the advantages of using C#? Which features do you find most useful?
3. What IDE have you used with C#? Do you have a preference? If so, why?
4. Can you tell us about any projects you made with C#?
5. What was the most challenging development project that you worked on?
6. Can you explain the three types of comments in C#? How are the comments represented?
7. Can you describe the difference between the "constant" and the "readonly" variables when using C#? When would you use each one?
8. Do you have experience using LINQ?
9. Can you list the differences between static, public and void? What is the outcome of using each?
10. Describe your experience with SQL Server.
11. Can you list the value types in C#? Can you list the reference types in C#?
12. Is there a difference between "String" and "StringBuilder" in C#? If so, what is the difference?
13. What are managed and unmanaged pieces of code?
14. Explain polymorphism.
15. Explain code compilation in C#.
16. What's serialization?
17. Why are strings in C# immutable?
18. What are the different types of classes in C#?
19. What are the control statements in C#?
20. Describe a different approach for passing a parameter.
21. What's the difference between a value type and a reference type?
22. Explain how file handling works in C#.
23. What are some common places to find a deadlock?
24. What are a class and an object?
25. What's the difference between virtual and abstract methods?
26. Explain namespaces in C#.
27. How do you implement exception handling in C#?
28. What are boxing and unboxing?
29. What is Operator Overloading and how does it work?
30. How do you prevent a class from being inherited?
31. What's the use of an array?
32. How does C# handle encapsulation?
33. What's an escape sequence? Name the sequences in C#.
34. What's the primary use of delegates?
35. Explain nullable types in C#.
36. What is your favorite part of the development process and why?
37. What is the execution entry point for a C# console application?
38. What is a singleton?
39. Can you name three ways to pass parameters to a method in C#?
40. What are Events?
41. What are some of the features of generics in C#?
42. Explain Get and Set Accessor properties?
43. Do you have experience working with XML in C#?
44. Explain the role of structs in C#. Why would you choose to define a type as a struct instead of a class?
45. Describe the basic construction of a C# program. Write a simple program that outputs “Hello World” to the console.
46. Write a C# method to total all the even numbers in an array of ints.
47. Quickly build a simple C# application of your choice from scratch, for us to see.

C# Developer Interview Questions and Answers

Every interview is different and the questions may vary. However, there are lots of general questions that get asked at every interview.

Below are some common questions you'd expect during C# Developer interviews. Click on each question to see how to answer them.

1. Do You Have Any Questions for Us?
2. Tell Me About Yourself
3. What is Your Greatest Strength?
4. What is Your Salary Expectation?
5. Are You a Leader or a Follower?
6. What Is Your Greatest Accomplishment?
7. Why Should We Hire You?
8. What is Your Greatest Weakness?
9. Why Do You Want To Leave Your Current Job?
10. Why Do You Want This Job?