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SUN Sun Certified Web Component Developer for J2EE 5 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="${param.subject}">
${param.body}
< /forum:message>
C) <forum:message from="My Name" subject="My Subject" />
D) <forum:message from="My Name"
subject="<%= request.getParameter( "subject" ) %>">
My message body.
< /forum:message>
E) <forum:message subject="My Subject">
My message body.
< /forum:message>

2. Squeaky Beans Inc. hired an outside consultant to develop their web application. To finish the job quickly, the consultant created several dozen JSP pages that directly communicate with the database. The Squeaky business team has since purchased a set of business objects to model their system, and the Squeaky developer charged with maintaining the web application must now refactor all the JSPs to work with the new system. Which pattern can the developer use to solve this problem?

A) Intercepting Filter
B) Transfer Object
C) Business Delegate
D) Service Locator

3. A developer is designing a multi-tier web application and discovers a need to log each incoming client request. Which two patterns, taken independently, provide a solution for this problem? (Choose two.)

A) Intercepting Filter
B) Front Controller
C) Model-View-Controller
D) Transfer Object
E) Business Delegate
F) Service Locator

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

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

5. Which three are true about TLD files? (Choose three.)

A) When deployed inside a JAR file, TLD files must be in the META-INF directory, or a subdirectory of it.
B) A tag handler's attribute must be included in the TLD file only if the attribute can accept request-time expressions.
C) The web container recognizes TLD files placed in any subdirectory of WEB-INF.
D) The web container can generate an implicit TLD file for a tag library comprised of both simple tag handlers and tag files.
E) The web container can automatically extend the tag library map described in a web.xml file by including entries extracted from the web application's TLD files.

Solutions: