How many messaging models do JMS provide for and what are they?

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JMS provide for two messaging models, publish-and-subscribe and point-to-point queuing.

2013-07-12, 1867👍, 0💬

Is JSP technology extensible?
Is JSP technology extensible? YES. JSP technology is extensible through the development of custom actions, or tags, which are encapsulated in tag libraries. 2019-01-07, 4548👍, 1💬

💬 2019-01-07 Hgf: Very good

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, 2865👍, 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(). Thereâ€™s nothing to stop you. But you shouldnâ€™t. The original reason for init() was that ancient versions of Java couldnâ€™t dynamically invoke constructors wit... 2013-07-10, 2173👍, 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, 2167👍, 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, 2076👍, 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, 2010👍, 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 Systemâ€™s IPAddress and Port Number. 2013-07-12, 1965👍, 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, 1925👍, 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, 1920👍, 0💬

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