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

1. Which two classes or interfaces provide a getSession method? (Choose two.)

A) javax.servlet.http.HttpSessionContext
B) javax.servlet.http.HttpSessionBindingEvent
C) javax.servlet.http.HttpSessionAttributeEvent
D) javax.servlet.http.HttpServletResponse
E) javax.servlet.http.HttpServletRequest

2. 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 Java SE'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 stores the user's Preference object when an HTTP session is created. Also, note that user identification information is stored in an HTTP cookie.
Which partial listener class can accomplish this goal?

A) public class UserPrefLoader implements SessionListener {
public void sessionCreated(SessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().addAttribute("prefs", userPrefs);
}
// more code here }
B) public class UserPrefLoader implements SessionListener {
public void sessionInitialized(SessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().addAttribute("prefs", userPrefs);
}
// more code here
}
C) public class UserPrefLoader implements HttpSessionListener {
public void sessionCreated(HttpSessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().setAttribute("prefs", userPrefs);
}
// more code here
}
D) public class UserPrefLoader implements HttpSessionListener {
public void sessionInitialized(HttpSessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getHttpSession().setAttribute("prefs", userPrefs);
}
// more code here
}

3. You are building your own layout mechanism by including dynamic content for the page's header and footer sections. The footer is always static, but the header generates the <title> tag that requires the page name to be specified dynamically when the header is imported. Which JSP code snippet performs the import of the header content?

A) <jsp:include page='/WEB-INF/jsp/header.jsp'> <jsp:param name='pageName' value='Welcome Page' /> </jsp:include>
B) <jsp:include page='/WEB-INF/jsp/header.jsp'> <jsp:attribute name='pageName' value='Welcome Page' /> </jsp:include>
C) <jsp:import page='/WEB-INF/jsp/header.jsp'> <jsp:param name='pageName' value='Welcome Page' /> </jsp:import>
D) <jsp:import page='/WEB-INF/jsp/header.jsp'> <jsp:attribute name='pageName' value='Welcome Page' /> </jsp:import>

4. Click the Exhibit button.
As a maintenance feature, you have created this servlet to allow you to upload and remove files on your web server. Unfortunately, while testing this servlet, you try to upload a file using an HTTP request and on this servlet, the web container returns a 404 status.
What is wrong with this servlet?

A) The servlet needs a service method to dispatch the requests to the helper methods.
B) The doPut and doDelete methods do NOT map to the proper HTTP methods.
C) HTTP does NOT support file upload operations.
D) The servlet constructor must NOT have any parameters.

5. DRAG DROP
Click the Task button.
Place the appropriate element names on the left on the web application deployment descriptor on the right so that files ending in ".mpg" are associated with the MIME type "video/mpeg."

Solutions: