Inheritance

Message passing

Encapsulation

Polymorphism

Very long functions that can hardly run

One function containing another one or more functions inside it.

Two or more functions with the same name but different number of parameters or type.

Function with more than one form

Operator– ()

Operator+ ()

Operator * ()

Operator =()

Return function

Caller

Called function

None of these

Function overloading

Function overriding

Operator overloading

Method overloading

Type

Number of arguments

Both 1) and 2)

None of these

Method function

Operator function

Constructor function

Data function

Function overloading

Constructor overloading

Operator overloading

Data overloading

Two functions having same number of argument, order and type of argument can be overloaded if both functions do not have any default argument.

Overloaded function must have default arguments.

Overloaded function must have default arguments starting from the left of argument list.

A function can be overloaded more than once.

Reusability of classes

Supports building extensible systems

It can hide instance variables and irrelevant methods of a class from other objects

Easy to maintain the code