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

1. 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>
< tr>
< td>
< news:lookup />
< news:item info="${headline}" />
< /td>
< /tr>
< /table>
B) <news:lookup />
< table>
< tr>
< td><news:item info="${headline}" /></td>
< /tr>
< /table>
C) <table>
< news:lookup>
< tr>
< td><news:item info="${headline}" /></td>
< /tr>
< /news:lookup>
< /table>
D) <table>
< tr>
< news:lookup>
< td><news:item info="${headline}" /></td>
< /news:lookup>
< /tr>
< /table>

2. All of your JSPs need to have a link that permits users to email the web master. This web application is licensed to many small businesses, each of which have a different email address for the web master. You have decided to use a context parameter that you specify in the deployment descriptor, like this:
4 2. <context-param>
4 3. <param-name>webmasterEmail</param-name>
4 4. <param-value>[email protected]</param-value>
4 5. </context-param>
Which JSP code snippet creates this email link?

A) <a href='mailto:${initParam.webmasterEmail}'>contact us</a>
B) <a href='mailto:${contextInitParam.webmasterEmail}'>contact us</a>
C) <a href='mailto:${contextParam.webmasterEmail}'>contact us</a>
D) <a href='mailto:${applicationScope.webmasterEmail}'>contact us</a>

3. Given the element from the web application deployment descriptor:
< jsp-property-group>
< url-pattern>/main/page1.jsp</url-pattern>
< scripting-invalid>true</scripting-invalid>
< /jsp-property-group>
and given that /main/page1.jsp contains:
< % int i = 12; %>
< b><%= i %></b>
What is the result?

A) <b></b>
B) The JSP fails to execute.
C) <b>12</b>
D) <% int i = 12 %>
< b><%= i %></b>

4. Which two are characteristics of the Intercepting Filter pattern? (Choose two.)

A) It forces resource authentication to be distributed across web components.
B) It provides centralized request handling for incoming requests.
C) It reduces coupling between presentation-tier clients and underlying business services.
D) It allows preprocessing and postprocessing on the incoming requests and outgoing responses.
E) It can be added and removed unobtrusively, without requiring changes to existing code.

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

Solutions: