Answer Posted / sunil

oops....its a object oriented concept....
this concept is used in different language for reducing line
of code,complexity..
oops having 4 important pillar.
1)Abstraction:
*Hide unnecessary data and show only important think.
*we can create method of abstract class if method is
Abstract method.
2)Encapsulation:
* Binding data and provide security.
ex..
create
class A
{

}

class A binding all methods,variable etc..
and provide security.

3)Polymorphism
same think but behave differently..
Same method name but different parameter...
ex..Method A(int a,int b)//A method name and 2 parameter.
{
}
Method A(int a,int b,int c)//A method name and 3 parameter.
{
}
4)Inheritance
Ability to create new class from existing class...
*inheritance variable,method from existing class
ex..
class A
{
int a,b,c;
}
class B:A
{

}
so we dont need to declare these variable again class B bcoz
these variable inherit from existing class .

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