What are servlets?

What do I need to develop servlets?

How does servlet performance compare to applets?

How does servlet performance compare to CGI?

Should I use single-threaded, or multi-threaded servlets?

How do I send cookies from a servlet?

How do I read browser cookies from a servlet?

How do I make cookies expire after a set time period?

Why aren't cookies stored by my servlets accessible to my CGI scripts or ASP pages?

How can I void a cookie, and delete it from the browser?

  What are the types of Servlet?
  What are the differences between HttpServlet and Generic Servlets?

  Differentiate between Servlet and Applet..

  Differentiate between doGet and doPost method?

  What are methods of HttpServlet?
  What are the advantages of Servlets over CGI programs?

  What is a Session?
  What is Session ID?
  What is Session Tracking?
  What  are different types of Session Tracking?
  What is HTTPSession Class?
  Why do u use Session Tracking in HttpServlet?
  What are the advantage of Cookies over URL rewriting?
  How to track a user session in Servlets?
  How you can destroy the session in Servlet?