1.Explain JSP life Cycle methods?

• jsp engine controls the life cycle of jsp
• Jsp life cycle is described by three life cycle methods and six life cycle phases

• jspInit()
• _jspService()
• jspDestroy()

• Jspinit() method is invoked when JSP page is initialized.
• The _jspService() method corresponds to the body of the jsp page.
• This method is defined automatically by the JSp container and should never be defined y the JSP page author.

Jsp Life cycle Phases: 

• Translation phase
• Compilation phase
• Instantiation phase
• initialization phase
• Servicing phase
• Destruction phase

2. What are the Jsp Implicit Objects?

• Implicit objects in jsp are the objects that are created by the container automatically and the container makes all these 9 implicit objects to the developer.
• We do not need to create them explicitly, since these objects are created and automatically by container and are accessed using standard variables(objects) are called implicit objects.
• The following are of implicit variables available in the JSP.  

1. out
2. request
3. response
4. config
5. application
6. session
7. pagecontext
8. page
9. exception

3. Explain Jsp Scripting Elements?

• Jsp scripting elements are used to embed jva code in to the jsp.
• Jsp scripting elements are three types
  
  1. Declaration
  2. Expression
  3. Scriplet

4. What are the Directives in Jsp?

 Read More at: Jsp Directive Elements

 5. What are the differences between include directive and include action?

6. How to disable session in JSP?

• By using page directive
• <%@ page session="false" %> 

7. How can we handle exceptions in a JSP page?

• We can handle exception in jsp by using error page element of page directive 

• The errorPage attribute tells the JSP engine which page to display if there is an error while the current page runs.
  The value of the errorPage attribute is a relative URL.
  The following directive displays MyErrorPage.jsp when all uncaught exceptions are thrown
  

  Syntax:

  errorPage="url"
  

  Example:

  <%@ page errorPage="error.jsp"%>

8.How can we override -JSPinit() and _jspDestroy() methods in a jsp?

• Both methods are executed once in a life cycle of a jsp.
• We can override these two method as shown below.
• <%!
      public void jspInit() {
          . . .
      }
  %>
• <%!    
      public void jspDestroy() {
          . . .   
      }
  %>

9.Can a JSP extend a java class?

10.How can we pass information from one jsp to included jsp page?

• <jsp:include page="employeedetail.jsp" flush="true">
• <jsp:param name="name" value="abc"/>
• <jsp:param name="id" value="220"/>