Question

Which among the following is true?

(a) A class may have virtual destructor but not virtual constructor

(b) A class may have virtual constructor but not virtual destructor

(c) A class may have virtual constructor and virtual constructor

(d) A class may have either virtual destructor or virtual constructor

I had been asked this question at a job interview.

My query is from Virtual Functions topic in portion Member Functions & its Types of Object Oriented Programming

Answer 1

Correct choice is (a) A class may have virtual destructor but not virtual constructor

The explanation: Any class can contain virtual destructor. But is not possible to define a virtual constructor. The reason behind is that the destructors can be overridden but constructors should not be.