What is the need of session tracking in web application?
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hi actully i hav form columns with origin and destination names .as like as i need to create one more column with name amount. my requirement is when i select origin and destination columns automatically i need to get amount from database.how can i. please tel me with relative code
Who is responsible to create the object of servlet?
What is meant by session? Tell me something about httpsession class?
What are the life cycle methods of a servlet?
Can we write a constructor for a Servlet class ? if yes how ? if no why not ?
In the servlets, we are having a web page that is invoking servlets ,username and password? which is checks in database? Suppose the second page also if we want to verify
How can I share objects across different sessions?
give the syntax of doGet() and doPost()?
Should I override the service() method?
What are the methods in HttpSession and their use?
What do you mean by httpservlet?
how JSP can extend servlet or interface ...?
Core Java 
