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This time its servlet interview questions, I was thinking what to pick for my interview series and then I thought about J2EE and Servlet is my favorite on that space. Servlet is an important part of any J2EE development and serves as Controller on many web MVC frameworks and that�s why it�s quite popular on J2EE interviews. These Servlet questions are based on my experience as well as collected by friends and colleague and they are not only good for interview practice but also shows a new direction of learning for anyone who is not very familiar with servlet technology. As said earlier this interview question article is part of my earlier series java interview questions , UNIX command interview questions and Java threading interview questions . You can find answers to all these questions on google but I have also listed my answers for quick reference. Read more �

Avoiding multiple submission of HTML form or POST data is common requirement in Java web application. Thankfully, You can prevent multiple submission by disabling submit button in HTML and JavaScript itself, rather than handling it on server side. This is very common requirement while developing web application using Servlet and JSP or any other web technology. At same time there are lot of information and noise available in web and its very hard to find simple approach to disable submit button. When I search for simple way to disable submit button in HTML and JavaScript , I was overwhelmed by responses on forums and various online community. Those are good for intermediate HTML and JavaScript developer but a beginner might just get overwhelmed by amount of information presented and rather confused to use which approach will work, how exactly should I disable submit button to prevent multiple form submissions etc. That drives me to write this post and summarize the simplest possib...

What is JSESSIONID in JSP-Servlet JSESSIONID is a cookie generated by Servlet containers like Tomcat or Jetty and used for session management in J2EE web application for HTTP protocol. Since HTTP is a stateless protocol there is no way for Web Server to relate two separate requests coming from the same client and Session management is the process to track user session using different session management techniques like Cookies and URL Rewriting . If a Web server is using a cookie for session management it creates and sends JSESSIONID cookie to the client and then the client sends it back to the server in subsequent HTTP requests . JSESSIONID and session management is a not only a popular Servlet interview question but also appear in various JSP interviews . Along with What is JSESSIONID interviewer are also interested in when and how JSESSIONID is created in Servlet and JSP which we will see in next section. Read more �