複選題
32 Given:

 Which three EL expressions, inserted at line 16, are valid and evaluate to "d"? (Choose three)
(A) ${map.c}
(B) ${map.[c]}
(C) ${map.["c"]}
(D) ${map.map.b}
(E) ${map.[map.b]} F. ${map. (map.b)}

28 An application stores session data in a JavaBean object. The object is then stored in the HttpSession object. Which is true? (A) Synchronization of all bean methods is required to ensure thread safety. (B) Thread safety is not an issue, since concurrent access to a single session is impossible. (C) Appropriate protection against problems caused by concurrent access should be provided by the bean. (D) The servlet should take precautions to ensure that concurrent access to the bean is prevented. (E) The servlet should implement SingleThreadModel

29 Given a war file with the following structure | - WEB-INF/classes/Myservlet.class | - WEB-INF/lib/wf.jaf Where wf.jar contains a valid web-fragment.xml and the following two classes: MyFilter1.class and MyFiler2.class. The web-fragment.xml is as follows: The following are some code snippets: When one access "/" of the above web application, which filters will be executed? (A) No filters will be executed. (B) MyFilter1 (C) MyFilter2 (D) MyFilter1 and MyFilter2

30 A Client wants to retrieve a representation of a resource, for example an HTML page, allowing a cached version to be returning by an intermediary such a proxy server. Which HTTP method should it use? (A) GET (B) PUT (C) POST (D) DELETE

31 Which security mechanism uses the concept of a realm? (A) authorization (B) data integrity (C) confidentiality (D) authentication

33 A web application wants to expose to its clients an operation that results in a transaction being performed across several systems, for example the transfer of money from one bank account to another Which HTTP method should it use? (A) GET (B) HEAD (C) OPT IONS (D) POST

34 You have a simple wpb application that has a single Front Controller servlet that dispatches to JSPs 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 / retrieveOrder.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? IT Certification Guaranteed, The Easy Way! (A) reques.setAttribute ("orderID", orderID);request.setAttribute("jspURL", jspURL);RequestDispatcher view= context.getRequestDispathcher ("/WEB - INF / retrieveOrder.do");view.forward(request, response) (B) reques.setParameter ("orderID", orderID);request.setParameter("jspURL", jspURL);Dispatcher view= request.getDispatcher ("/WEB - INF / retrieveOrder.do");View.forwardRequest (request, response); (C) String T= "/WEB - INF / retrieveOrder.do?orderID = %d&jspURl = %s";String url = String.format (T, orderID, jspURL);RequestDispatcher view = context.getRequestDispatcher (url);View.forward (request, response); (D) String T= "/WEB - INF / retrieveOrder.do?orderID = %d&jspURl = %s";String url = String.format (T, orderID, jspURL);Dispatcher view= context.getDispatcher (url);View.forwardRequest (request, response);

複選題35 Given:  11. ＜%  12. request.setAttribute ("vals", new String[] {"1", "2", "3", "4"});  13. request.setAttribute ("index", "2");  14. %＞ 15. ＜% - - insert code here - - %＞ Which three EL expressions, inserted at line 15, are valid and evaluate to "3"? (Choose three) (A) ${vals.2} (B) ${vals ["2"] } (C) ${vals.index} (D) ${vals[index] } (E) ${vals} [index] (F) ${vals. (vals.index) } (G) ${vals [vals[index-1]] }

複選題36 When using the @WebListener annotation, the class on which the annotation is applied to must also implement at least one of the following interfaces (Choose two): (A) RequestListener (B) AttributeListener (C) ServletContextListener (D) HttpSessionListener (E) SessionAttributeListener (F) AsyncListener

37 The jquery_1_3_2.jar file contains the JQuery Ajax framework in its META-INF/ resources directory. Where should the jar file be placed inside the web application to ensure the resources it contains are accessible by clients? (A) WEB-INF/classes (B) WEB-INF/jar (C) WEB-INF/lib (D) WEB INF/resources

38 Which java code snippet checks whether the user is of the role "MANAGER" for a given HttpServRequest, httpServletRequest? (A) httpServletRequest.isUserInRole("MANAGER"); (B) httpServletRequest.isCallerInRole("MANAGER"); (C) httpServletRequest.isPrincipalInRole("MANAGER"); (D) httpServletRequest.isAuthnticatedUserInRole("MANAGER");