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

1. Given this fragment from a Java EE deployment descriptor:
341.
<error-page>
342.
<exception-type>java.lang.Throwable</exception-type>
343.
<location>/mainError.jsp</location>
344.
</error-page>
345.
<error-page>
346.
<exception-type>java.lang.ClassCastException</exception-type>
347.
<location>/castError.jsp</location>
348.
</error-page>
If the web application associated with the fragment above throws a ClassCastException.
Which statement is true?

A) The deployment descriptor is invalid.
B) The container invokes mainError.jsp.
C) Neither mainError.jsp nor castError.jsp is invoked.
D) The container invokes castError.jsp.

2. Which activity supports the data integrity requirements of an application?

A) using HTTP Basic authentication
B) using an LDAP security realm
C) using HTTPS as a protocol
D) using forms-based authentication

3. You want to create a valid directory structure for your Java EE web application, and your application uses tag files and a JAR file. Which three must be located directly in your WEBINF directory (NOT in a subdirectory of WEB-INF)? (Choose three.)

A) A directory called lib
B) A directory called TLDs
C) A directory called META-INF
D) A directory called tags
E) The JAR file
F) A directory called classes

4. Users of your web application have requested that they should be able to set the duration of their sessions. So for example, one user might want a webapp to stay connected for an hour rather than the webapp's default of fifteen minutes; another user might want to stay connected for a whole day.
Furthermore, you have a special login servlet that performs user authentication and retrieves the User object from the database. You want to augment this code to set up the user's specified session duration.
Which code snippet in the login servlet will accomplish this goal?

A) User user = // retrieve the User object from the database session.setDuration(user.getSessionDuration());
B) User user = // retrieve the User object from the database session.setDurationInterval(user.getSessionDuration());
C) User user = // retrieve the User object from the database session.setMaxDuration(user.getSessionDuration());
D) User user = // retrieve the User object from the database session.setMaxDurationInterval(user.getSessionDuration());
E) User user = // retrieve the User object from the database session.setInactiveInterval(user.getSessionDuration());
F) User user = // retrieve the User object from the database session.setMaxInactiveInterval(user.getSessionDuration());

5. You are creating an error page that provides a user-friendly screen whenever a server exception occurs. You want to hide the stack trace, but you do want to provide the
exception's error message to the user so the user can provide it to the customer service agent at your company. Which EL code snippet inserts this error message into the error page?

A) Message: <b>${request.exception.errorMessage}</b>
B) Message: <b>${exception.errorMessage}</b>
C) Message: <b>${request.exception.message}</b>
D) Message: <b>${exception.message}</b>
E) Message: <b>${pageContext.exception.message}</b>
F) Message: <b>${pageContext.exception.errorMessage}</b>

Solutions: