INTERVIEW QUESTIONS J2EE SERVLET DETAILS

Question: Types of Servlets?

Answer: Servlets must implement the interface javax.servlet.Servlet. There are two main types of servlets:

Generic servlets extend javax.servlet.GenericServlet. Generic servlets are protocol independent, meaning that they contain no inherent support for HTTP or any other transport protocol.

HTTP servlets extend javax.servlet.HttpServlet. These servlets have built-in support for the HTTP protocol and are much more useful in an Browser environment

Servlets must implement the interface javax.servlet.Servlet. There are two main types of servlets:

Generic servlets extend javax.servlet.GenericServlet. Generic servlets are protocol independent, meaning that they contain no inherent support for HTTP or any other transport protocol.

HTTP servlets extend javax.servlet.HttpServlet. These servlets have built-in support for the HTTP protocol and are much more useful in an Browser environment
Source: CoolInterview.com

Servlet Is an interface.
Generic Servlet is an abstract class it has only Service() method. where as Http Servlet is an concrete class it has doGet()and doPost() methods. Source: CoolInterview.com

2 types of servlets is the wrong answer.The correct answer is,
there are n number of servlets are there.
there are,HttpServlets,SMTP Servlets,FTP servlets and etc.
Since all the web servers available in market are designed as HTTP servers programmers prefer working with HttpServlet. Source: CoolInterview.com

Servlet is an Interface
It is mainly two types they are
1.GenericServlet
2.HttpServlet
Generic Servlet is an abstract class
HttpServlet is a concrete class Source: CoolInterview.com

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