C# Programming Advanced Quiz 2

1. How can you implement polymorphism in C#?

2. What is a "preprocessor directive" in C#? Give an example other than #define .

3. What is the purpose of using statements in C#?

4. Explain what a NullReferenceException is and what typically causes it.

5. When would you use a struct instead of a class in C#?

6. How can you implement exception handling in C#?

7. What is the difference between "pass-by-value" and "pass-by-reference" in C# method arguments?

8. Explain the concept of "covariance" and "contravariance" in C# delegates and generics.

9. What is the significance of the async and await keywords in C#?

10. How does the lock statement work in C#?