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SUN 310-083 Exam Syllabus Topics:

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

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

2. In a JSP-centric shopping cart application, you need to move a client's home address of the Customer object into the shipping address of the Order object. The address data is stored in a value object class called Address with properties for: street address, city, province, country, and postal code. Which two JSP code snippets can be used to accomplish this goal? (Choose two.)

A) <c:set var='order' property='shipAddress'>
< jsp:getProperty name='client' property='homeAddress' />
< /c:store>
B) <c:set target='${order}' property='shipAddress'>
< jsp:getProperty name='client' property='homeAddress' />
< /c:set>
C) <c:set var='order' property='shipAddress'
value='${client.homeAddress}' />
D) <c:set target='${order}' property='shipAddress'
value='${client.homeAddress}' />
E) <c:setProperty name='${order}' property='shipAddress'>
< jsp:getProperty name='client' property='homeAddress' />
< /c:setProperty>
F) <jsp:setProperty name='${order}' property='shipAddress'
value='${client.homeAddress}' />

3. A developer chooses to avoid using SingleThreadModel but wants to ensure that data is updated in a thread-safe manner. Which two can support this design goal? (Choose two.)

A) Store the data in an instance variable.
B) Store the data in the HttpSession object.
C) Store the data in the ServletContext object.
D) Store the data in the ServletRequest object.
E) Store the data in a local variable.

4. Which security mechanism uses the concept of a realm?

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

5. After a merger with another small business, your company has inherited a legacy WAR file but the original source files were lost. After reading the documentation of that web application, you discover that the WAR file contains a useful tag library that you want to reuse in your own webapp packaged as a WAR file.
What do you need to do to reuse this tag library?

A) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the whole thing as a JAR file, and place that
JAR file in your webapp's library directory.
B) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the WAR, and place that WAR file in your webapp's WEB-INF directory.
C) Simply rename the legacy WAR file as a JAR file and place it in your webapp's library directory.
D) Unpack the legacy WAR file, move the TLD file to the META-INF directory, repackage the whole thing as a JAR file, and place that JAR file in your webapp's library directory.

Solutions: