Encapsulation

Abstraction

polymorphisms

inheritance/delegation

OOPS Concepts are mainly 4 
 1.Abstraction
 2.Encapsulation
 3.Inheritance 
 4.Polymorphisam
Abstraction:-Hidding non-essential features and showing the
essential features

              (or)
Hidding unnecessary data from the users details,is called
abstraction.
Real Time example:TV Remote Button 

in that number format and power buttons and other buttons
there.just we are seeing the butttons,we don't see the
button circuits.i.e buttons circutes and wirings all are
hidden.so i think its good example.

Encapsulation:

    Writing Operations and methods stored in a single
class.This is Called Encapsulation

Real Time Example:Medical Capsuals
i.e one drug is stored in buttom layer and another drug is
stored in Upper layer these two layers are combined in
single capsual.

Inheritance:
   The New Class is Existing from Old Class,i.e SubClass is
Existing from Super Class.

Real Time Example:
      Father and Son Relationship

Polymorphisam:

          Sinle Form behaving diffreantly in diffreant
Situations.
  Example:-
            Person
Person in Home act is husband/son,
       in Office acts Employer.
       in Public Good Cityzen. 

I think these all are real time experianceany.is there any 
more answers send me my mail also.

Thanks all
CM

1)Abstraction: 

Abstraction is a way to remove the association of the
behavior of an object with the actual details behind the
scenes which implement that object's behavior. This
'abstraction' is usually accomplished through the use of
base classes with virtual functions; each derived function
provides the details that implement the behavior behind that
abstraction.

eg/we invented flight based on the mechanism of Birds. So
flight is derived form the base of birds.

2)Encapsulation: 

It is a process of binding or wrapping the data and the
codes that operates on the data into a single entity. This
keeps the data safe from outside interface and misuse. One
way to think about encapsulation is as a protective wrapper
that prevents code and data from being arbitrarily accessed
by other code defined outside the wrapper.

eg/ Ink is the important component in pen but it is hiding
by some other material

3)Polymorphism: 

a single function or single operator has different character
in different place.

eg/A girl plays a role of daughter at home and a manager at
office

4)Inheritance:

 The new classes, known as derived classes, take over (or
inherit) attribute and behavior of the pre-existing classes,
which are referred to as base classes (or Parent classes).
It is intended to help reuse existing code with little or no
modification.

eg/ parent-child relation

OOPS Concepts are mainly 4 
 1.Abstraction
 2.Encapsulation
 3.Inheritance 
 4.Polymorphisam
Abstraction:-Hidding non-essential features and showing the
essential features

              (or)
Hidding unnecessary data from the users details,is called
abstraction.
Real Time example:TV Remote Button 

in that number format and power buttons and other buttons
there.just we are seeing the butttons,we don't see the
button circuits.i.e buttons circutes and wirings all are
hidden.so i think its good example.

Encapsulation:

    Writing Operations and methods stored in a single
class.This is Called Encapsulation

Real Time Example:Medical Capsuals
i.e one drug is stored in buttom layer and another drug is
stored in Upper layer these two layers are combined in
single capsual.

Inheritance:
   The New Class is Existing from Old Class,i.e SubClass is
Existing from Super Class.

Real Time Example:
      Father and Son Relationship

Polymorphisam:

          Sinle Form behaving diffreantly in diffreant
Situations.
  Example:-
            Person
Person in Home act is husband/son,
       in Office acts Employer.
       in Public Good Cityzen. 

I think these all are real time experianceany.is there any 
more answers send me my mail  mdevendra@gmail.com also.

Thanks all
Devendra.M