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

1. Which two are true concerning the objects available to developers creating tag files?
(Choose two.)

A) The session object must be declared explicitly.
B) The output stream is available through the implicit outStream object.
C) The request and response objects are available implicitly.
D) The servlet context is available through the implicit servletContext object.
E) The JspContext for the tag file is available through the implicit jspContext object.

2. Which two about WAR files are true? (Choose two.)

A) The web container must allow access to resources in JARs in the web application library directory.
B) WAR files must be located in the web application library directory.
C) WAR files must be created by using archive tools designed specifically for that purpose.
D) The web container must serve the content of any META-INF directory located in a WAR file.
E) WAR files must contain the web application deployment descriptor.

3. If you want to use the Java EE platform's built-in type of authentication that uses a custom
HTML page for authentication, which two statements are true? (Choose two.)

A) In the HTML related to authentication for this application, you must use predefined variable names for the variables that store the user and password values.
B) When you use this type of authentication, SSL is turned on automatically.
C) Your deployment descriptor will need to contain this tag:
< auth-method>CUSTOM</auth-method>.
D) The related custom HTML login page must be named loginPage.html.
E) You must have a tag in your deployment descriptor that allows you to point to both a login HTML page and an HTML page for handling any login errors.

4. Which statement is true about web container session management?

A) The JSESSIONID cookie is stored permanently on the client so that a user may return to the web application and the web container will rejoin that session.
B) If the web application uses HTTPS, then the web container may use the data on the
HTTPS request stream to identify the client.
C) Access to session-scoped attributes is guaranteed to be thread-safe by the web container.
D) To activate URL rewriting, the developer must use the
HttpServletResponse.setURLRewriting method.

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 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 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
}
B) 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
}
C) 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
}
D) 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
}

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