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Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. A developer wants a web application to be notified when the application is about to be shut down. Which two actions are necessary to accomplish this goal? (Choose two.)

A) include a class implementing ServletContextListener as part of the web application deployment
B) configure a listener in the TLD file using the <listener> element
C) configure a listener in the application deployment descriptor, using the <listener> element
D) include a listener directive in a JSP page
E) include a <servlet-destroy> element in the web application deployment descriptor
F) include a class implementing HttpSessionAttributeListener as part of the web application deployment
G) include a class implementing ContextDestroyedListener as part of the web application deployment

2. Which ensures that a JSP response is of type "text/plain"?

A) <%@ page contentEncoding="text/plain" %>
B) <%@ page contentType="text/plain" %>
C) <% response.setEncoding("text/plain"); %>
D) <%@ page pageEncoding="text/plain" %>
E) <%@ page mimeType="text/plain" %>
F) <% response.setMimeType("text/plain"); %>

3. Your web application uses a simple architecture in which servlets handle requests and then forward to a JSP using a request dispatcher. You need to pass information calculated in the servlet to the JSP for view generation. This information must NOT be accessible to any other servlet, JSP or session in the webapp. Which two techniques can you use to accomplish this goal? (Choose two.)

A) Add parameters to the request object.
B) Add attributes on the request object.
C) Add parameters to the JSP's URL when generating the request dispatcher.
D) Use the pageContext object to add request attributes.
E) Add attributes to the session object.

4. Which two are valid and equivalent? (Choose two.)

A) <%! int i; %>
B) <jsp:declaration>int i;</jsp:declaration>
C) <%= int i; %>
D) <jsp:scriptlet>int i;</jsp:scriptlet>
E) <jsp:expr>int i;</jsp:expr>

5. Your web site has many user-customizable features, for example font and color
preferences on web pages. Your IT department has already built a subsystem for user preferences using the Java SE platform's lang.util.prefs package APIs, and you have been ordered to reuse this subsystem in your web application. You need to create an event listener that constructs the preferences factory and stores it in the application scope for later use. Furthermore, this factory requires that the URL to a database must be declared in the deployment descriptor like this:
42.
<context-param>
43.
<param-name>prefsDbURL</param-name>
44.
<param-value>
45.
jdbc:pointbase:server://dbhost:4747/prefsDB
46.
</param-value>
47.
</context-param>
Which partial listener class will accomplish this goal?

A) public class PrefsFactoryInitializer implements ServletContextListener {
public void contextCreated(ServletContext ctx) {
String prefsURL = ctx.getInitParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.setAttribute("myPrefsFactory", myFactory);
}
// more code here
}
B) public class PrefsFactoryInitializer implements ContextListener {
public void contextInitialized(ServletContextEvent e) {
ServletContext ctx = e.getContext();
String prefsURL = ctx.getParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.putAttribute("myPrefsFactory", myFactory);
}
// more code here
}
C) public class PrefsFactoryInitializer implements ServletContextListener {
public void contextInitialized(ServletContextEvent e) {
ServletContext ctx = e.getServletContext();
String prefsURL = ctx.getInitParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.setAttribute("myPrefsFactory", myFactory);
}
// more code here }
D) public class PrefsFactoryInitializer implements ContextListener {
public void contextCreated(ServletContext ctx) {
String prefsURL = ctx.getParameter("prefsDbURL");
PreferencesFactory myFactory = makeFactory(prefsURL);
ctx.putAttribute("myPrefsFactory", myFactory);
}
// more code here
}

Solutions: