Author - Amatya Agyey

Tech Lead - Senior Software Engineer

 

 Here are 50 interview questions for someone with 10 years of experience in C#:

1. What is C#? How does it differ from other programming languages?
2. Explain the difference between value types and reference types in C#.
3. What are the different access modifiers in C#?
4. Describe the concept of boxing and unboxing in C#.
5. What is the purpose of the 'using' statement in C#?
6. Explain the differences between 'ref' and 'out' parameters.
7. What is the difference between 'readonly' and 'const' variables in C#?
8. Describe the purpose of delegates in C#.
9. What are lambda expressions? How are they used in C#?
10. Explain the concept of exception handling in C#.
11. What is the difference between a class and a struct in C#?
12. How does garbage collection work in C#?
13. Describe the difference between an abstract class and an interface in C#.
14. What is the purpose of the 'var' keyword in C#?
15. Explain the concept of polymorphism in C#.
16. What is an extension method in C#?
17. How do you implement multithreading in C#?
18. Describe the difference between synchronous and asynchronous programming in C#.
19. What is a delegate multicast in C#?
20. Explain the concept of generics in C#.
21. How do you handle events in C#?
22. What is the purpose of the 'using' directive in C#?
23. Describe the concept of a property in C#.
24. How do you implement a singleton pattern in C#?
25. What are the different types of collections in C#?
26. Explain the concept of indexers in C#.
27. What is the purpose of the 'async' and 'await' keywords in C#?
28. Describe the concept of inversion of control (IoC) and dependency injection (DI) in C#.
29. How do you implement a custom exception class in C#?
30. What is the purpose of the 'yield' keyword in C#?
31. Explain the concept of reflection in C#.
32. How do you implement encryption and decryption in C#?
33. Describe the concept of attribute-based programming in C#.
34. What is the purpose of the 'volatile' keyword in C#?
35. Explain the difference between 'StringBuilder' and 'String' in C#.
36. How do you work with XML in C#?
37. Describe the concept of operator overloading in C#.
38. What is the purpose of the 'checked' and 'unchecked' keywords in C#?
39. Explain the concept of code contracts in C#.
40. How do you implement a thread-safe singleton in C#?
41. Describe the differences between the 'lock' statement and the 'Monitor' class in C#.
42. What is the purpose of the 'nameof' operator in C#?
43. How do you work with JSON in C#?
44. Explain the concept of attributes and metadata in C#.
45. What are anonymous types in C#?
46. Describe the concept of a tuple in C#.
47. How do you implement a custom iterator in C#?
48. Explain the difference between 'IEnumerable' and 'IQueryable' in C#.
49. What are the different types of serialization in C#?
50. Describe the concept of a memory-mapped file in C#.