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Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. Which is a benefit of precompiling a JSP page?

A) It provides better performance on the first request for the JSP page.
B) It avoids execution of the _jspService method on the first request.
C) It avoids initialization on the first request.
D) It provides the ability to debug runtime errors in the application.

2. For manageability purposes, you have been told to add a "count" instance variable to a critical JSP Document so that a JMX MBean can track how frequent this JSP is being invoked. Which JSP code snippet must you use to declare this instance variable in the JSP Document?

A) <%! int count = 0; %>
B) <jsp:declaration> int count = 0; <jsp:declaration>
C) <jsp:scriptlet.declaration> int count = 0; <jsp:scriptlet.declaration>
D) <jsp:declaration.instance> int count = 0; <jsp:declaration.instance>

3. After a merger with another small business, your company has inherited a legacy WAR file but the original source files were lost. After reading the documentation of that web
application, you discover that the WAR file contains a useful tag library that you want to reuse in your own webapp packaged as a WAR file.
What do you need to do to reuse this tag library?

A) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the WAR, and place that WAR file in your webapp's WEB-INF directory.
B) Unpack the legacy WAR file, move the TLD file to the META-INF directory, repackage the whole thing as a JAR file, and place that JAR file in your webapp's library directory.
C) Simply rename the legacy WAR file as a JAR file and place it in your webapp's library directory.
D) Unpack the legacy WAR file, move the TLD file to the META-INF directory, move the class files to the top-level directory, repackage the whole thing as a JAR file, and place that JAR file in your webapp's library directory.

4. Given a header in an HTTP request:
X-Retries: 4
Which two retrieve the value of the header from a given HttpServletRequest request? (Choose two.)

A) request.getIntHeader("X-Retries")
B) request.getRequestHeaders("X-Retries").get(0)
C) request.getHeader("X-Retries")
D) request.getHeaders("X-Retries").get(0)
E) request.getRequestHeader("X-Retries")

5. You have a simple web application that has a single Front Controller servlet that dispatches to JSPs to generate a variety of views. Several of these views require further database processing to retrieve the necessary order object using the orderID request parameter. To do this additional processing, you pass the request first to a servlet that is mapped to the URL pattern /WEB-INF/retreiveOrder.do in the deployment descriptor. This servlet takes two request parameters, the orderID and the jspURL. It handles the database calls to retrieve and build the complex order objects and then it dispatches to the jspURL.
Which code snippet in the Front Controller servlet dispatches the request to the order retrieval servlet?

A) String T="/WEB-INF/retreiveOrder.do?orderID=%d&jspURL=%s";
String url = String.format(T, orderID, jspURL);
Dispatcher view
= context.getDispatcher(url);
view.forwardRequest(request, response);
B) String T="/WEB-INF/retreiveOrder.do?orderID=%d&jspURL=%s";
String url = String.format(T, orderID, jspURL);
RequestDispatcher view
= context.getRequestDispatcher(url);
view.forward(request, response);
C) request.setParameter("orderID", orderID);
request.setParameter("jspURL", jspURL);
Dispatcher view
= request.getDispatcher("/WEB-INF/retreiveOrder.do");
view.forwardRequest(request, response);
D) request.setAttribute("orderID", orderID);
request.setAttribute("jspURL", jspURL);
RequestDispatcher view
= context.getRequestDispatcher("/WEB-INF/retreiveOrder.do");
view.forward(request, response);

Solutions: