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Welcome Anonimous.User to this quiz related to Test JSP and Servlets.

Read the question and choose the best answer. Time is limited to 40 seconds!

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Question:
You have a custom DataSource which requires some initialization when the servlet context is initialized. You declared it in the DD: <resource-ref> <res-ref-name>jdbc/MySource</res-ref-name> <res-type>javax.sql.DataSource</res-type> <res-auth>Container</res-auth> </resource-ref> The listener you wrote looks like this: public final class InitializeDataSource implements ServletContextListener { public void contextInitialized(ServletContextEvent e) { Object o = Naming.lookup("jdbc/MySource"); MySource s = (MySource) PortableRemoteObject.narrow(o, MySource.class); s.connect(); } public void contextDextroyed(ServletContextEvent e) { } } How can you make it so that this initialization is done once when the servlet context is initialized? Identify the correct snipped for the DD.

<listeners>
<listener-class>
com.theserver.InitializeDataSource
</listener-class>
</listeners>

<listener-classes>
com.theserver.InitializeDataSource
</listener-classes>

<listener>
com.theserver.InitializeDataSource
</listener>

<context-listener>
<listener-class>
com.theserver.InitializeDataSource
</listener-class>
</context-listener>

<listener>
<listener-class>
com.theserver.InitializeDataSource
</listener-class>
</listener>

<listeners>
<listener>
jdbc/MySource
</listener>
</listeners>

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