Important Interview Questions of Servlets and JSP (JAVA)

• What are Servlets?
• What are advantages of servlets over CGI?
• Can you explain Servlet life cycle?
• What are the two important API’s in for Servlets?
• Can you explain in detail “javax.servlet” package?
• What’s the use of Servlet Context?
• How do we define an application level scope for servlet?
• What's the difference between Generic Servlet and Http Servlet?
• Can you explain in detail javax.servlet.http package?
• What’s the architecture of a Servlet package?
• Why is HTTP protocol called as a stateless protocol?
• What are the different ways we can maintain state between requests?
• What is URL rewriting?
• What are cookies?
• What are sessions in Servlets?
• What the difference is between get Session (true) and get Session (false)?
• What’s the difference between “do Post” and “do get” methods?
• Which are the different ways you can communicate between servlets?
• What is functionality of “Request Dispatcher” object?
• How do we share data using “get Servlet Context ()”?
• Explain the concept of SSI?
• What are filters in JAVA?
• Can you explain in short how do you go about implementing filters using Apache Tomcat?
• Twist: - Explain step by step of how to implement filters?
• What’s the difference between Authentication and authorization?
• Explain in brief the directory structure of a web application?
• Can you explain JSP page life cycle?
• What is EL?
• How does EL search for an attribute?
• What are the implicit EL objects in JSP?
• How can we disable EL?
• What is JSTL?
• Can you explain in short what the different types of JSTL tags are?
• (I) How can we use beans in JSP?
• What is the use of <jsp: include>?
• What is <jsp: forward> tag for?
• What are JSP directives?
• What are Page directives?
• What are including directives?
• Can you explain taglib directives?
• How does JSP engines instantiate tag handler classes’ instances?
• What’s the difference between JavaBeans and taglib directives?
• What are the different scopes an object can have in a JSP page?
• What are different implicit objects of JSP?
• What are different Authentication Options available in servlets?
• Can you explain how do we practically implement security on a resource?
• How do we practically implement form based authentication?
• How do we authenticate using JDBC?
• Can you explain JDBCRealm?
• Can you explain how do you configure JNDIRealm?
• How did you implement caching in JSP?
• What is the difference between Servletcontext and ServletConfig?
• How do we prevent browser from caching output of my JSP pages?
• Can we explicitly destroy a servlet object?