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

1. Given:
1 0. public void service(ServletRequest request,
1 1. ServletResponse response) {
1 2. ServletInputStream sis =
1 3. // insert code here
1 4. }
Which retrieves the binary input stream on line 13?

A) request.getReader();
B) request.getResourceAsStream(ServletRequest.REQUEST);
C) request.getWriter();
D) request.getInputStream();
E) request.getResourceAsStream();

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

3. The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans.
Which pattern should be used to eliminate this duplicate code?

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

4. You need to store a floating point number, called Tsquare, in the session scope. Which two code snippets allow you to retrieve this value? (Choose two.)

A) float Tsquare = ((Float) session.getNumericAttribute.("Tsquare")).floatValue;
B) float Tsquare = ((Float) session.getFloatAttribute.("Tsquare")).floatValue;
C) float Tsquare = ((Float) session.getAttribute.("Tsquare")).floatValue();
D) float Tsquare = (Float) session.getAttribute("Tsquare");
E) float Tsquare = session.getFloatAttribute("Tsquare");
F) float Tsquare = (float) session.getNumericAttribute("Tsquare");

5. Which element of the web application deployment descriptor defines the servlet class associated with a servlet instance?

A) <servlet-class>
B) <servlet-mapping>
C) <webapp>
D) <class>
E) <codebase>
F) <servlet>

Solutions: