9-Inheritance & Polymorphism

Question 1

Order of constructor and destructor calling in class heriechy

Answer 1

const: goes up and, then down
const: down, and then up (reverse order)

Question 2

Destructor of a class with virtual functions

Answer 2

a class that contains virtual functions should also contain a virtual destructor: To ensure that the correct srequence of destructors is called.

Question 3

Why virtual functions and polymophism

Answer 3

Provide Dynamic binding: This allows the program to choose appropriate method of a particular object (not pointer) type at runtime.

• • virtual function (for Vtable)
• • pointer

Polymorphism: requirers overriding base class methods and using virtual functions