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

1. A developer has created a special servlet that is responsible for generating XML content that is sent to a data warehousing subsystem. This subsystem uses HTTP to request these large data files, which are compressed by the servlet to save internal network bandwidth.
The developer has received a request from management to create several more of these data warehousing servlets. The developer is about to copy and paste the compression code into each new servlet. Which design pattern can consolidate this compression code to be used by all of the data warehousing servlets?

A) Composite Facade
B) Intercepting Filter
C) Transfer Object
D) View Helper
E) Facade

2. 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) The related custom HTML login page must be named loginPage.html.
B) When you use this type of authentication, SSL is turned on automatically.
C) 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.
D) 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.
E) Your deployment descriptor will need to contain this tag:
< auth-method>CUSTOM</auth-method>.

3. Which three are described in the standard web application deployment descriptor?
(Choose three.)

A) context root for the application
B) ServletContext initialization parameters
C) web container default port bindings
D) session configuration
E) MIME type mappings
F) servlet instance pool configuration

4. You have been contracted to create a web site for a free dating service. One feature is the ability for one client to send a message to another client, which is displayed in the latter client's private page. Your contract explicitly states that security is a high priority.
Therefore, you need to prevent cross-site hacking in which one user inserts JavaScript code that is then rendered and invoked when another user views that content. Which two
JSTL code snippets will prevent cross-site hacking in the scenario above? (Choose two.)

A) <c:out value='${message}' />
B) <c:out value='${message}' eliminateXml='true' />
C) <c:out eliminateXml='true'>${message}</c:out>
D) <c:out>${message}</c:out>
E) <c:out value='${message}' escapeXml='true' />

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

Solutions: