What are the mechanisms used by a servlet container for maintaining session information?
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What is a Session Id?
Which interface should be implemented by all servlets?
What is difference between ServletResponse sendRedirect() and RequestDispatcher forward() method?
what is servlet and what you get when we use servlets?
Tell us something about servletconfig interface.
without session Id can we do any operations like add,update,edit,delete. I saw Session id is loaded for edit and delete action not for add .so am asking this
init() method of servlet loaded by?
How will two or three servlets interact or communicate with each other?
what is the different between a servlet and a cgi? Why do you go for servlet rather than cgi?
What’s the use of the servlet wrapper classes??
how the server will know its the same jsp page?
Is there any need to shutdown the web server, if you want to modify a servlet?
Core Java 
