1.Inheritance is oops feature by which we can use the methods and functions of base class

2.Single Inheritance the type of inheritance where there is only one deriived class for base class

example:

public class derived imlements baseclass

3.multiple inheritance is the type of inheritance where there is one derived class for two base class.it is done using the help of interface and abstract class

example:

public class derived extends abstract implements inter

3.Abstract Class

abstact class are class which are used in inheritance.The abstract class have the keyword abstract.in abstract class we can declare the method using the keyword

abstract functionname();

4.Get

this method is used in servlets where the information fed by user is transmitted as query string

Post:

 this method is used in servlets where the information fed by user is transmitted after encryption.