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

1. Click the Exhibit button.
Assuming the tag library in the exhibit is imported with the prefix forum, which custom tag invocation produces a translation error in a JSP page?

A) <forum:message from="My Name" subject="My Subject">
<%= request.getParameter( "body" ) %>
</forum:message>
B) <forum:message from="My Name"
subject="<%= request.getParameter( "subject" ) %>">
My message body.
</forum:message>
C) <forum:message from="My Name" subject="My Subject" />
D) <forum:message subject="My Subject">
My message body.
</forum:message>
E) <forum:message from="My Name" subject="${param.subject}">
${param.body}
</forum:message>

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 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
}
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 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
}
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
}

3. One of the use cases in your web application uses many session-scoped attributes. At the end of the use case, you want to clear out this set of attributes from the session object. Assume that this static variable holds this set of attribute names:
201.
private static final Set<String> USE_CASE_ATTRS;
202.
static {
203.
USE_CASE_ATTRS.add("customerOID");
204.
USE_CASE_ATTRS.add("custMgrBean");
205.
USE_CASE_ATTRS.add("orderOID");
206.
USE_CASE_ATTRS.add("orderMgrBean");
207.
}
Which code snippet deletes these attributes from the session object?

A) for ( String attr : USE_CASE_ATTRS ) {
session.deleteAttribute(attr);
}
B) for ( String attr : USE_CASE_ATTRS ) { session.remove(attr); }
C) for ( String attr : USE_CASE_ATTRS ) {
session.removeAttribute(attr);
}
D) session.removeAll(USE_CASE_ATTRS);
E) session.deleteAllAttributes(USE_CASE_ATTRS);

4. 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) Your deployment descriptor will need to contain this tag: <auth-method>CUSTOM</auth-method>.
B) 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.
C) When you use this type of authentication, SSL is turned on automatically.
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.

5. Which two security mechanisms can be directed through a sub-element of the <user-dataconstraint> element in a web application deployment descriptor? (Choose two.)

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

Solutions: