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SUN 310-083 Exam Syllabus Topics:

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

1. Which three are true about the HttpServletRequestWrapper class? (Choose three.)

A) An HttpServletRequestWrapper may be used only by a class implementing the javax.servlet.Filter interface.
B) An HttpServletRequestWrapper CANNOT be used on the request passed to the
RequestDispatcher.include method.
C) The HttpServletRequestWrapper is an example of the Decorator pattern.
D) An HttpServletRequestWrapper may modify the header of a request within an object implementing the javax.servlet.Filter interface.
E) A subclass of HttpServletRequestWrapper CANNOT modify the behavior of the getReader method.
F) The HttpServletRequestWrapper can be used to extend the functionality of a servlet request.

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

3. Given:
6. <% int[] nums = {42, 420, 4200};
7. request.setAttribute("foo", nums); %>
Which two successfully translate and result in a value of true? (Choose two.)

A) ${requestScope['foo'][1] = 420}
B) ${(requestScope['foo'][0] lt 50) && (3 gt 2)}
C) ${requestScope[foo][0] > 500}
D) ${true or false}

4. Assume that a news tag library contains the tags lookup and item:
lookup Retrieves the latest news headlines and executes the tag body once for each headline. Exposes a NESTED page-scoped attribute called headline of type com.example.Headline containing details for that headline.
item Outputs the HTML for a single news headline. Accepts an attribute info of type com.example.Headline containing details for the headline to be rendered.Which snippet of JSP code returns the latest news headlines in an HTML table, one per row?

A) <table>
< news:lookup>
< tr>
< td><news:item info="${headline}" /></td>
< /tr>
< /news:lookup>
< /table>
B) <table>
< tr>
< td>
< news:lookup />
< news:item info="${headline}" />
< /td>
< /tr>
< /table>
C) <news:lookup />
< table>
< tr>
< td><news:item info="${headline}" /></td>
< /tr>
< /table>
D) <table>
< tr>
< news:lookup>
< td><news:item info="${headline}" /></td>
< /news:lookup>
< /tr>
< /table>

5. Given an HttpServletRequest request and an HttpServletResponse response:
4 1. HttpSession session = null;
4 2. // insert code here
4 3. if(session == null) {
4 4. // do something if session does not exist
4 5. } else {
4 6. // do something if session exists
4 7. }
To implement the design intent, which statement must be inserted at line 42?

A) session = request.getSession("jsessionid");
B) session = response.getSession();
C) session = request.getSession(false);
D) session = request.getSession();
E) session = request.getSession(true);

Solutions: