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

1. A JSP page contains a taglib directive whose uri attribute has the value dbtags. Which XML element within the web application deployment descriptor defines the associated TLD?

A) <tld>
< tld-uri>dbtags</tld-uri>
< tld-location>/WEB-INF/tlds/dbtags.tld</tld-location>
< /tld>
B) <tld>
< uri>dbtags</uri>
< location>/WEB-INF/tlds/dbtags.tld</location>
< /tld>
C) <taglib>
< uri>dbtags</uri>
< location>/WEB-INF/tlds/dbtags.tld</location>
< /taglib>
D) <taglib>
< taglib-uri>dbtags</taglib-uri>
< taglib-location>
/WEB-INF/tlds/dbtags.tld
< /taglib-location>
< /taglib>

2. Which two actions protect a resource file from direct HTTP access within a web application? (Choose two.)

A) creating a <web-resource> element within the deployment descriptor
B) placing it in the /META-INF/secure directory
C) placing it in the /secure directory
D) placing it in the /WEB-INF directory
E) creating a <secure-resource> element within the deployment descriptor

3. You have built a collection of custom tags for your web application. The TLD file is located in the file: /WEB-INF/myTags.xml. You refer to these tags in your JSPs using the symbolic name: myTags. Which deployment descriptor element must you use to make this link between the symbolic name and the TLD file name?

A) <tags>
< tags-uri>myTags</taglib-uri>
< tags-location>/WEB-INF/myTags.xml</tags-location>
< /tags>
B) <taglib>
< taglib-uri>myTags</taglib-uri>
< taglib-location>/WEB-INF/myTags.xml</taglib-location>
< /taglib>
C) <tags>
< name>myTags</name>
< location>/WEB-INF/myTags.xml</location>
< /tags>
D) <taglib>
< name>myTags</name>
< location>/WEB-INF/myTags.xml</location>
< /taglib>

4. What is the purpose of session management?

A) To store information on the client-side between HTTP requests.
B) To store information on the server-side between HTTP requests.
C) To manage the user's login and logout activities.
D) To tell the web container to keep the HTTP connection alive so it can make subsequent requests without the delay of making the TCP connection.

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 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
}
B) 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
}
C) 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
}
D) 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
}

Solutions: