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

1. A JSP page needs to instantiate a JavaBean to be used by only that page. Which two jsp:useBean attributes must be used to access this attribute in the JSP page? (Choose two.)

A) scope
B) create
C) name
D) type
E) id
F) class

2. Given:
11.
<servlet>
12.
<servlet-name>catalog</servlet-name>
13.
<jsp-file>/catalogTemplate.jsp</jsp-file>
14.
<load-on-startup>10</load-on-startup>
15.
</servlet>
Which two are true? (Choose two.)

A) Line 14 is not valid for a servlet declaration.
B) The servlet will be referenced by the name catalog in mappings.
C) Line 13 is not valid for a servlet declaration.
D) One instance of the servlet will be loaded at startup.
E) Ten instances of the servlet will be loaded at startup.

3. Which three web application deployment descriptor elements allow web components to gain references to resources or EJB components? (Choose three.)

A) javamail-ref
B) jdbc-ref
C) ejb-remote-ref
D) ejb-ref
E) resource-env-ref
F) servlet-ref
G) resource-ref

4. 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 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 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
}

5. What is the purpose of session management?

A) To manage the user's login and logout activities.
B) To store information on the client-side between HTTP requests.
C) 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.
D) To store information on the server-side between HTTP requests.

Solutions: