What
Is JSP?
JSP stands for Java Server Page.
JSP is a server side technology which is used for
creating dynamic web pages.
JSP is an extension of Servlets.
JSP comes with SUN’s J2EE platforms.
What
Are the Advantages of JSP?
JSP enables server side programming abilities.
JSP represents HTML pages embed with Java code.
JSP is cross platform technology.
JSP can create database driven Web applications.
Is
JSP Technology extensible?
Yes!, JSP is an extensible by using the
modification of tags.
What
Are the JSP Life Cycle?
The JSP life-cycle is defined as the process
started with its creation which later translated to a servlet and afterward
servlet life-cycle comes into play.
A JSP Life cycle consists of following steps:
1. Translation
of JSP to Servlet code
2. Compilation
of Servlet to byte code
3. Loading
Servlet class
4. Creating
servlet instance
5. Initialization
by calling jspInit() method
6. Request
Processing by calling _jspService()
method
7. Destroying
by calling jspDestroy() method
Compilation process of JSP page involves three
steps:
1. Parsing
of JSP
2. Turning
JSP into servlet
3. Compiling
the servlet
What
Are JSP Life Cycle methods?
The JSP Life Cycle methods are:
The jspInit() method - It is invoked only once.
The _jspService() method - It is invoked at each
request.
The jspDestroy() method - It is invoked only
once.
We can override jspInit(), jspDestroy() but we
can’t override _jspService() method.
Which
JSP lifecycle methods can be overridden? How?
The jspInit() and jspDestroy() methods can be
overridden within a JSP page.
What
Are the Implicit Objects in JSP?
Objects created by web container and contain
information regarding a particular request, application or page is called
Implicit Objects.
The implicit objects are:
1. Request
2. Response
3. PageContext
4. Session
5. Application
6. Out
7. Config
8. Page
9. Exception
What
do JSP literals consist of?
1. Boolean
2. Integer
3. Floating
point
4. String
5. Null
How
Many Types of Tags exist in the JSTL library?
1. Core
Tags
2. Localization
Tags
3. Formatting
Tags
4. XML
Tags
5. JSTL
Functions Tags
6. SQL
Tags
You can create JSP Custom Tags with the below
items:
1. JSP
Custom Tag Handler
2. Creating
Tag Library Descriptor (TLD) File
3. Deployment
Descriptor Configuration (DDC) for TLD
What
Are the three Tags used in JSP bean development?
1. <jsp:
useBean>
2. <jsp:
setProperty>
3. <jsp:
getProperty>
What
Are the Standard Actions Available in JSP?
The standard actions are:
1. <jsp:
include>
2. <jsp:
forward>
3. <jsp:
useBean>
4. <jsp:
setProperty>
5. <jsp:
getProperty>
6. <jsp:
param>
7. <jsp:
plugin>
How
can a thread safe JSP page be implemented?
Yes!, by implemented the SingleThreadModel
Interface.
Add <%@page
isThreadSafe="false" %> directive in the
JSP page.
What
Is the difference between ServletContext and PageContext?
The ServletContext gives the information about
the container while PageContext gives about the Request.
Is
JSP used in the MVC model?
Yes!, JSP used MVC pattern (Model View Controller) for presentation.
What
Is the function of <jsp:include> action?
The syntax − <jsp:include
page = "relative URL" flush="true" />
Where page is the relative URL of the page to be
included
Where flush is the Boolean attribute determines
whether the included resource has its buffer flushed before it is included.
What
Is a Request object?
The Request object is an instance of
javax.servlet.http.HttpServletRequest. Each time a client request a page the
JSP engine create a new object to represent that request.
What
Is a Response object?
The Response object is an instance of a
javax.servlet.http.HttpServletRequest and server create the request object.
What
Is Composition?
The Composition has a stronger relationship with
the object than Aggregation.
What
Is JSTL?
JSP Standard Tag Library is a library of
predefined tags that ease the development of JSP.
How
To disable session in JSP?
Using the - <%@ page session="false"
%>
What
Are Different Types of comments in JSP?
The JSP pages provide two types of comments:
HTML Comments - <!-- HTML Comment -->
JSP Comments - <%-- JSP Comment --%>
Can
we use JavaScript with JSP Pages?
Yes!, Why Not. We can use as per your needs.
How
Many Scripting Elements in JSP?
There are three scripting language elements:
1. Declarations
2. Scriptlets
3. Expressions
Explain
the different attributes of a page directive?
Here 13 attributes available for a page
directive and some of the important attributes are:
1. <import>
2. <session>
3. <contentType>
4. <isELIgnored>
Is
it possible from a JSP page to process HTML form content?
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