Behaving in different ways depending upon input receive is know as polymorphism. i.e. whenever input changes automatically output or behavior also changes. There are basically...
A pointer can have Null value ,int *p=Null means, it is not having any address to point . while reference can't have &p=Null(not allowed).2- address...
Abstraction which denotes/shows the essential characteristics of an object which distinguish it from all other kinds of objects.Ex. Consider a person details.Doctor needs || Interviewer...