1. What is a class?
2. What are the advantages of OOP?
3. What is a constructor?
4. What is polymorphism?
5. What are interfaces?
6. Are properties allowed in an interface?
7. Is multiple inheritance allowed in C#?
8. What are abstract classes?
9. What is a static class?
10. What is a static method?
11. What are the problems of multiple inheritance, if any?
12. What are the available access specifiers in C#?
13. What is internal in C#?
14. What is serializing?
15. What is encoding in the context of serializing?
16. What is it meant by mutable?
17. What are attributes in C#?
18. Explain using statement
19. What is value type? What is reference type?
20. What is CLR?