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SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

1. Which three are valid values for the body-content attribute of a tag directive in a tag file?
(Choose three.)

A) scriptless
B) JSP
C) dynamic
D) tagdependent
E) EL
F) empty

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

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

3. Your web application requires the ability to load and remove web files dynamically to the web container's file system. Which two HTTP methods are used to perform these actions?
(Choose two.)

A) SEND
B) POST
C) DELETE
D) DESTROY
E) REMOVE
F) PUT

4. Which security mechanism uses the concept of a realm?

A) authentication
B) confidentiality
C) authorization
D) data integrity

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:
4 2. <context-param>
4 3. <param-name>prefsDbURL</param-name>
4 4. <param-value>
4 5. jdbc:pointbase:server://dbhost:4747/prefsDB
4 6. </param-value>
4 7. </context-param>
Which partial listener class will accomplish this goal?

A) 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
}
B) 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
}
C) 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
}
D) 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
}

Solutions: