Questions in: JAVA

Yes, of course you can use VBScript in JSP.
Scripts are client side stuffs n are not related to server
side components like JSP or servlets.
But VBScript is supported on a very limited browser(like IE).
So your JSP may not work on other browsers like mozilla
firefox n all.
So better check out what browser ur customers are going to
use and the use either VBscript or javascript.

I'm not sure what you mean by "VBScript with JavaScript" -
mixing both on a single page?-, but VBScript is limited to
one particular browser on one particular operating system,
so you'd be shutting out a lot of users from your
application.

As per me smart form means reproduce the same form by
clicking '+' sign button etc.
It can be possibe with jquery.

first tell me hows ur structure in jsp page ::::

It depends on the web application.
If it stores the answer on the client page(html /jsp page)
then u can see the source and using any javascript/vbscript
can write a script to show the element's value.
But if ur input is checked on the server side then u can't
do anything..(n this is what generally done)

Ask the person who prepared those questions.

Scriplet tag is one of the JSP tag, it will replicate the
entire code in the service method.
In the exclamatory Tag, you can define the Global variables
and write the user defined methods.

In sendRedirect new request is generated forwarded to the
specified page.where as in forward old reuest is forwarded
to the specifed page

isThreadSafe sattes that wheather jsp engine can pass
multiple req simultaneously to the page . a value set to
true(default) indicates that a new thread is started and
therfore request are handled simultaneously . ise the jsp
engine can send multiple concurent lient request to the jsp
page . value set to false indicates that jsp engine sends
lient request one at a time to the jsp page .
It is recommended to always use the value tue for the is
threadsafe page directive and handled multithread issue
by avoiding jsp declaration and ensures that all object
used by the page are thread safe.
Syntex
<% page isthreadSafe="true"%>

just add the directive <%@ page isThreadSafe="false" %>
with the jsp page..

using url rewriting.

We have to use URL Rewriting for tracking sessions if
cookie is disabled..we are mentioning the session id here..

Using <jsp:forward> you can forward the request and
response object to the concern URL. Where as in
sendRedirect, it will not carry the request and response
object details.

Forwrd :: when we invoke forward the request is sent to the
another resource on the server without the client being
inform that difference resource is going to process that
request.
SendRedirect :: when we invoke sendRedirect, It causes the
web container to return to the brouser that means new URL
should be requested.
SendRedirecr takes extra round trip
Forward is fater than sendRedirect

language
import
session
buffer
isThreadSafe
ErrorPage
isErrorPage
Info
contentType
pageEncoding
isELIgnore
autoflush

We can have any number of page directive in a single jsp
page provided it should have only 'import' attribute.
e.g.
<%@ page import="beans.abc" buffer="2k"%> //1
.
.
.// some jsp page code
.
<%@ page import="beans.xyz"%> //2
if we replace line 2 with
<%@ page import="beans.xyz" buffer="4k"%> //not allowed
In short, we can use page directive many times but for
importing some other classes, not for setting other
attribute values.

Yes we can write java methods inside jsp files within
the "declarations" tag <!%//the method%>.
This part of the code is compiled by the servlet engine and
inserted outside the _jspservice() method in the generated
servlet class.

<%!
action-specifier return type methodname(arguemnts)
{
statements.............or task
}
%>

<%
Cookie mycookie = new Cookie("aName","aValue");
response.addCookie(mycookie);
%>

<%
Cookie killMyCookie = new Cookie("mycookie", null);
<%-- mycookie is the cookie instance which we have to
delete%>
killMyCookie.setMaxAge(0);
killMyCookie.setPath("/");
response.addCookie(killMyCookie);
%>

Scriptlet, expression and declaration are called JSP
scripting elements.

<%....%>scriptlet , embeding scripting code
<%=...%>expression
<%!....%> declaration

Relationof servlet and JSP is
RequestDispatcher reqdip=req.RequestDispatcher("sum.jsp");
forward.req(req,res)

Jsp pages are focussed around HTML (or XML) with java codes
and JSP tags inside them.When a web server that has JSP
support is asked for a JSP page,it checks to see if it has
already compiled the page into a servlet.Thus ,JSP pages
become servlets and are transformed into pure Java and then
compiled,loaded into the server and executed.

A directive is a way for you to give special instruction to
the container at page translation time.
3 flavours
page
include
taglib

1)page directive
2)include directive
3)taglib directive

one more implicit object availbale in JSP: exception

To simplify code in JSP expressions and scriptlets, we can
use eight automatically defined variables, called implicit
objects.
They are
request,response,out,session,application,config,pageContext
and page.

Action tag is used to transfer the control between pages
and is also used to enable the use of server side
JavaBeans. Instead of using Java code, the programmer uses
special JSP action tags to either link to a Java Bean set
its properties, or get its properties.
There are many action tags that are available for Java
Server Pages. The most commonly used action tags are three
of them and they are namely:
include
forward
useBean

JSP actions use constructs in XML syntax to control the
behavier of the servlet engine.you can dynamially insert a
file, reuse Java Beans Components,forward the user to
another page,or generate HTML for the java plugin.Available
actions include:
jsp:include,jsp:useBean,jsp:setProperty,jsp:getProperty,jsp:forward,jsp:plugin