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

1. Which EL expression evaluates to the request URI?

A) ${request.getURI}
B) ${requestURI}
C) ${request.URI}
D) ${requestScope.requestURI}
E) ${requestScope.request.requestURI}
F) ${pageContext.request.requestURI}
G) ${request.requestURI}

2. The Squeaky Beans Inc. shopping application was initially developed for a non-distributed environment. The company recently purchased the Acme Application Server, which supports distributed HttpSession objects. When deploying the application to the server, the deployer marks it as distributable in the web application deployment descriptor to take advantage of this feature.
Given this scenario, which two must be true? (Choose two.)

A) The J2EE web container must support migration of objects that implement Serializable.
B) Storing references to Enterprise JavaBeans components in the HttpSession object might
NOT be supported by J2EE web containers.
C) The J2EE web container must use the native JVM Serialization mechanism for distributing HttpSession objects.
D) As per the specification, the J2EE web container ensures that distributed HttpSession objects will be stored in a database.

3. Given:
3 . class MyServlet extends HttpServlet {
4 . public void doPut(HttpServletRequest req,
HttpServletResponse resp)
throws ServletException, IOException {
5. // servlet code here
...
2 6. }
2 7. }
If the DD contains a single security constraint associated with MyServlet and its only <http- method> tags and <auth-constraint> tags are:
< http-method>GET</http-method>
< http-method>PUT</http-method>
< auth-constraint>Admin</auth-constraint>
Which four requests would be allowed by the container? (Choose four.)

A) A user whose role is Admin can perform a GET.
B) A user whose role is Member can perform a PUT.
C) A user whose role is Admin can perform a POST.
D) A user whose role is Member can perform a GET.
E) A user whose role is Admin can perform a PUT.
F) A user whose role is Member can perform a POST.

4. Click the Exhibit button. Given the web application deployment descriptor elements:
1 1. <filter>
1 2. <filter-name>ParamAdder</filter-name>
1 3. <filter-class>com.example.ParamAdder</filter-class>
1 4. </filter>
...
3 1. <filter-mapping>
3 2. <filter-name>ParamAdder</filter-name>
3 3. <servlet-name>Destination</servlet-name>
3 4. </filter-mapping>
...
5 5. <servlet-mapping>
5 6. <servlet-name>Destination</servlet-name>
5 7. <url-pattern>/dest/Destination</url-pattern>
5 8. </servlet-mapping>
What is the result of a client request of the Source servlet with no query string?

A) An exception is thrown at runtime within the service method of the Source servlet.
B) The output "filterAdded = addedByFilter" is written to the response stream.
C) The output "filterAdded = null" is written to the response stream.
D) An exception is thrown at runtime within the service method of the Destination servlet.

5. A developer has created a web application that includes a servlet for each use case in the application. These servlets have become rather difficult to maintain because the request processing methods have become very large. There is also common processing code in many servlets because these use cases are very similar. Which two design patterns can be used together to refactor and simplify this web application? (Choose two.)

A) Model-View-Controller
B) Business Delegate
C) View Helper
D) Session Facade
E) Proxy
F) Front Controller

Solutions: