10. Explain how an exception handler is defined and invoked in a program. 11. List the merits and demerits of defining an exception handler in an object-oriented programming. 12. Explain the importance...

10. Explain how an exception handler is defined and invoked in a program.

11. List the merits and demerits of defining an exception handler in an object-oriented programming.

12. Explain the importance of namespace declaration in C++.

13. What is meant by namespace std?

14. Explain how a nested namespace is used in C++.

15. What are the advantages of using unnamed namespace?