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What is a servlet engine?
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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
Who is responsible for writing a constructor?
Explain the working of service() method of a servlet.
Is it possible to send a mail from a servlet? Explain?
How do you track a user session in servlets?
How do you invoke a Servlet? What is the difference between doPost method and doGet method?
Why is servlet used?
Explain the jar and war files in servlet?
Why do we need a constructor in a servlet if we use the init method?
What is the difference between the servlets and cgi programs?
What are setComment and getComment methods in Cookies?
Why doesn’t a servlet include main()?
Core Java 
