15. What is a private inheritance? What are the merits and demerits of private inheritance. 16. What is a protected inheritance? Explain how a protected data of the base class can be accessed by the...

15. What is a private inheritance? What are the merits and demerits of private inheritance.

16. What is a protected inheritance? Explain how a protected data of the base class can be accessed by the public member function of the derived class.

17. What is a container class? List the pros and cons of declaring container classes.

18. How does an array of class objects declared with single inheritance?