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

1. A developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition, the application needs to find, in a transparent manner, the heterogeneous business components used to service the client's requests. Which design patterns, working together, address these issues?

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

2. Which two are characteristics of the Transfer Object design pattern? (Choose two.)

A) It increases the complexity of the remote interface by removing coarse-grained methods.
B) It increases the complexity of the design due to remote synchronization and version control issues.
C) It reduces network traffic by collapsing multiple remote requests into one.
D) It increases network performance introducing multiple fine-grained remote requests which return very small amounts of data.

3. Given the two security constraints in a deployment descriptor:
1 01. <security-constraint>
1 02. <!--a correct url-pattern and http-method goes here-->
1 03. <auth-constraint><role-name>SALES</role-name></auth-
1 03. <auth-constraint>
1 04. <role-name>SALES</role-name>
1 05. </auth-constraint>
1 06. </security-constraint>
1 07. <security-constraint>
1 08. <!--a correct url-pattern and http-method goes here-->
1 09. <!-- Insert an auth-constraint here -->
1 10. </security-constraint>
If the two security constraints have the same url-pattern and http-method, which two, inserted independently at line 109, will allow users with role names of either SALES or
MARKETING to access this resource? (Choose two.)

A) <auth-constraint>
< role-name>*</role-name>
< /auth-constraint>
B) <auth-constraint/>
C) <auth-constraint>
< role-name>MARKETING</role-name>
< /auth-constraint>
D) <auth-constraint>
< role-name>ANY</role-name>
< /auth-constraint>

4. You are creating a new JSP page and you need to execute some code that acts when the page is first executed, but only once. Which three are possible mechanisms for performing this initialization code? (Choose three.)

A) In the init method.
B) In a JSP declaration, which includes a static initializer block.
C) In a JSP declaration, which includes an initializer block.
D) In the constructor of the JSP's Java code.
E) In the jspInit method.

5. Which two are true about the JSTL core iteration custom tags? (Choose two.)

A) When looping over integers (for example begin='1' end='10'), a loop status object may not be used in the tag body.
B) The body of the tag may contain EL code, but not scripting code.
C) It may iterate over a map, but only the key of the mapping may be used in the tag body.
D) It may iterate over arrays, collections, maps, and strings.
E) When looping over collections, a loop status object may be used in the tag body.

Solutions: