17. What is a friend function? 18. Explain the pros and cons of declaring a friend class in a program. 19. How is a heap memory allocated in C++? 20. What are dynamic allocations operators? 21. What...

17. What is a friend function?

18. Explain the pros and cons of declaring a friend class in a program.

19. How is a heap memory allocated in C++?

20. What are dynamic allocations operators?

21. What are the differences between the static and dynamic allocation of memory?

22. What is meant by this operator?

23. What are the places this pointer used?

24. Explain how data member of a class can be destroyed in C++.