Which two are true about the JSTL core iteration custom tags? (Choose two.)

• A. It may iterate over a map, but only the key of the mapping may be used in the tag body.
• B. It may iterate over arrays, collections, maps, and strings.
• C. When looping over integers (for example begin='1' end='10'), a loop status object may not be used in the tag body.
• D. When looping over collections, a loop status object may be used in the tag body.
• E. The body of the tag may contain EL code, but not scripting code.

For which three events can web application event listeners be registered? (Choose three.)

• A. when a cookie has been created
• B. when a session is created
• C. when a servlet has forwarded a request
• D. after a servlet is destroyed
• E. when a session attribute value is changed
• F. when a session has timed out

Which two about WAR files are true? (Choose two.)

• A. The web container must allow access to resources in JARs in the web application library directory.
• B. The web container must serve the content of any META-INF directory located in a WAR file.
• C. WAR files must contain the web application deployment descriptor.
• D. WAR files must be created by using archive tools designed specifically for that purpose.
• E. WAR files must be located in the web application library directory.

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);
  RequestDispatcher view
  = context.getRequestDispatcher(url);
  view.forward(request, response);
• B. request.setAttribute("orderID", orderID);
  request.setAttribute("jspURL", jspURL);
  RequestDispatcher view
  = context.getRequestDispatcher("/WEB-INF/retreiveOrder.do");
  view.forward(request, response);
• C. 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);
• D. request.setParameter("orderID", orderID);
  request.setParameter("jspURL", jspURL);
  Dispatcher view
  = request.getDispatcher("/WEB-INF/retreiveOrder.do");
  view.forwardRequest(request, response);

The JSP developer wants a comment to be visible in the final output to the browser. Which comment style needs to be used in a JSP page?

• A. <% /** this is a comment **/ %>
• B. <%-- this is a comment --%>
• C. <% // this is a comment %>
• D. <!-- this is a comment -->