What are the purposes of the doGet, doPost, and doPut methods of the HttpServlet class?

SOLUTION:

1. doGet() :
protected void doGet(HttpServlet Request req, HttpServletResonse resp): This method is used in HttpServlet Class and this is called by
servlet service method for handling GET request from client. When this function is abrogate then it read the request data and write the
response data.

2. doPost() :
protected void doPost(HttpServletRequest req, HttpServletResponse resp) : This method is also used in HttpServlet Class and this is handle
the POST request form client. And according to this method client can send unlimited length of data in a single time and it is also used for
Posting information to the server.

3. doPut() :
protected void doPut(HttpServletRequest req, HttpServletResponse resp): This method is also used in HttpServlet Class and this is handled
the PUT request and the PUT operation admit to client for placing a file on the server as similar to FTP server.