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What JSP lifecycle methods can I override?
What JSP lifecycle methods can I override? You cannot override the _jspService() method within a JSP page. You can however, override the jspInit() and jspDestroy() methods within a JSP page. jspInit() can be useful for allocating resources like database connections, network connections, and so forth... 2013-07-24, 2351👍, 0💬

How do you restrict page errors display in the JSP page?
How do you restrict page errors display in the JSP page? You first set "Errorpage" attribute of PAGE directory to the name of the error page (ie Errorpage="error.jsp")in your jsp page .Then in the error jsp page set "isErrorpage=TRUE". When an error occur in your jsp page it will automatically call ... 2013-07-23, 3216👍, 0💬

How do I prevent the output of my JSP or Servlet pages from being cached by the browser?
How do I prevent the output of my JSP or Servlet pages from being cached by the browser? You will need to set the appropriate HTTP header attributes to prevent the dynamic content output by the JSP page from being cached by the browser. Just execute the following scriptlet at the beginning of your J... 2013-07-23, 2392👍, 0💬

How can I enable session tracking for JSP pages if the browser has disabled cookies?
How can I enable session tracking for JSP pages if the browser has disabled cookies? We know that session tracking uses cookies by default to associate a session identifier with a unique user. If the browser does not support cookies, or if cookies are disabled, you can still enable session tracking ... 2013-07-20, 2320👍, 0💬

Why does JComponent have add() and remove() methods but Component does not?
Why does JComponent have add() and remove() methods but Component does not? because JComponent is a subclass of Container, and can contain other components and jcomponents. How can I implement a thread-safe JSP page? - You can make your JSPs thread-safe by having them implement the SingleThreadModel... 2013-07-20, 2513👍, 0💬

How do I include static files within a JSP page?
How do I include static files within a JSP page? Static resources should always be included using the JSP include directive. This way, the inclusion is performed just once during the translation phase. Do note that you should always supply a relative URL for the file attribute. Although you can also... 2013-07-17, 2505👍, 0💬

What are stored procedures? How is it useful?
What are stored procedures? How is it useful? A stored procedure is a set of statements/commands which reside in the database. The stored procedure is pre-compiled and saves the database the effort of parsing and compiling sql statements everytime a query is run. Each database has its own stored pro... 2013-07-17, 2400👍, 0💬

In the Servlet 2.4 specification SingleThreadModel has been deprecated, why?
In the Servlet 2.4 specification SingleThreadModel has been deprecated, why? Because it is not practical to have such model. Whether you set isThreadSafe to true or false, you should take care of concurrent client requests to the JSP page by synchronizing access to any shared objects defined at the ... 2013-07-16, 2417👍, 0💬

How many JSP scripting elements are there and what are they?
How many JSP scripting elements are there and what are they? There are three scripting language elements: declarations, scriptlets, expressions. 2013-07-16, 2584👍, 0💬

How to Retrieve Warnings?
How to Retrieve Warnings? SQLWarning objects are a subclass of SQLException that deal with database access warnings. Warnings do not stop the execution of an application, as exceptions do; they simply alert the user that something did not happen as planned. A warning can be reported on a Connection ... 2013-07-15, 2458👍, 0💬

What Class.forName will do while loading drivers?
What Class.forName will do while loading drivers? It is used to create an instance of a driver and register it with the DriverManager. When you have loaded a driver, it is available for making a connection with a DBMS. 2013-07-15, 2365👍, 0💬

What information is needed to create a TCP Socket?
What information is needed to create a TCP Socket? The Local Systems IP Address and Port Number. And the Remote System’s IPAddress and Port Number. 2013-07-12, 2524👍, 0💬

How many messaging models do JMS provide for and what are they?
How many messaging models do JMS provide for and what are they? JMS provide for two messaging models, publish-and-subscribe and point-to-point queuing. 2013-07-12, 2168👍, 0💬

The code in a finally clause will never fail to execute, right?
The code in a finally clause will never fail to execute, right? Using System.exit(1); in try block will not allow finally code to execute. 2013-07-11, 2601👍, 0💬

. How can a servlet refresh automatically if some new data has entered the database?
. How can a servlet refresh automatically if some new data has entered the database? You can use a client-side Refresh or Server Push. 2013-07-11, 8140👍, 0💬

Can we use the constructor, instead of init(), to initialize servlet?
Can we use the constructor, instead of init(), to initialize servlet? Yes , of course you can use the constructor instead of init(). There’s nothing to stop you. But you shouldn’t. The original reason for init() was that ancient versions of Java couldn’t dynamically invoke constructors wit... 2013-07-10, 2719👍, 0💬

Why are JSP pages the preferred API for creating a web-based client program?
Why are JSP pages the preferred API for creating a web-based client program? Because no plug-ins or security policy files are needed on the client systems(applet does). Also, JSP pages enable cleaner and more module application design because they provide a way to separate applications programming f... 2013-07-09, 3512👍, 0💬

What are the implicit objects?
What are the implicit objects? Implicit objects are objects that are created by the web container and contain information related to a particular request, page, or application. They are: --request --response --pageContext --session --application --out --config --page --exception 2013-07-08, 2596👍, 0💬

What is JSP page?
What is JSP page? A JSP page is a text-based document that contains two types of text: static template data, which can be expressed in any text-based format such as HTML, SVG, WML, and XML, and JSP elements, which construct dynamic content. 2013-07-08, 2588👍, 0💬

What is JSP technology?
What is JSP technology? Java Server Page is a standard Java extension that is defined on top of the servlet Extensions. The goal of JSP is the simplified creation and management of dynamic Web pages. JSPs are secure, platform-independent, and best of all, make use of Java as a server-side scripting ... 2013-07-05, 2616👍, 0💬

What are the two kinds of comments in JSP and what's the difference between them.
What are the two kinds of comments in JSP and what's the difference between them. &lt%-- JSP Comment --%&gt &lt!-- HTML Comment --&gt 2013-07-05, 2382👍, 0💬

What is difference between custom JSP tags and beans?
What is difference between custom JSP tags and beans? Custom JSP tag is a tag you defined. You define how a tag, its attributes and its body are interpreted, and then group your tags into collections called tag libraries that can be used in any number of JSP files. To use custom JSP tags, you need t... 2013-07-04, 2283👍, 0💬

What is a JSP and what is it used for?
What is a JSP and what is it used for? Java Server Pages (JSP) is a platform independent presentation layer technology that comes with SUN s J2EE platform. JSPs are normal HTML pages with Java code pieces embedded in them. JSP pages are saved to *.jsp files. A JSP compiler is used in the background ... 2013-07-04, 2522👍, 0💬

What will be the default values of all the elements of an array defined as an instance variable?
What will be the default values of all the elements of an array defined as an instance variable? If the array is an array of primitive types, then all the elements of the array will be initialized to the default value corresponding to that primitive type. e.g. All the elements of an array of int wil... 2013-07-03, 3361👍, 0💬

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.NET C C++ CSS DBA General HTML Java JavaScript JSP JUnit MySQL Networking Oracle Perl Perl PHP PL/SQL RSS Software QA SQL Server Struts Unix Windows XHTML XML