A pure virtual function
A) must be overridden in a derived class for the function to be useful.
B) executes more efficiently than a non-pure virtual function.
C) must be accompanied by a virtual constructor of the same class.
D) All of the above
E) None of the above

Question

Quizplus · Accepted Answer

A pure virtual function is a virtual function with no implementation in the base class, and it must be overridden in the derived class. It acts as a placeholder and forces the derived class to provide its own implementation, making the function useful in the context of the derived class. The other statements are false - a pure virtual function does not necessarily execute more efficiently, and there is no such thing as a virtual constructor.

A Pure Virtual Function