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無年度 - Java EE 6 Web Component Developer Certified Expert Exam：1z0-899 (101-132)#84682

科目：OCE | 選擇題數：32 | 申論題數：0

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所屬科目：OCE

選擇題 (32)

複選題
101 In which two locations can library dependencies be defined for a web application? (Choose two) (A) the web application deployment descriptor (B) the /META-INF/dependencies.xml file (C) the /META-INF/MANIFEST.MF manifest file (D) the /META-INF/MANIFEST.MF manifest of a JAR in the web application classpath
102 Given:
 1. ＜% int[] nums = {42,420,4200};
 2. request.setAttribute("foo", nums); %＞
 3. ${5 + 3 It 6}
 4. S(requestScope['foo'][0] ne 10 div0＞
 5. ${10 div 0}
What is the result? (A) true true (B) false true (C) false true 0 (D) true true Infinity (E) false true Infinity
103 Which of following annotations can be used in a servlet class?
(i) @javax.annotation.Resource
(ii) @javax.annotation.PreDestroy
(iii) @javax.annotation.security.RunAs
(iv) @javax.annotation.security.RolesAllowed
(v) @javax.servlet.annotation.WebServlet (A) (v) only (B) (i) and (v) (C) (i), (ii), (iii) and (v) (D) (i), (ii), (iv) and (v) (E) (i), (ii), (iii), (iv) and (v)
104 All of your JSPs need to have a link that permits users to email the web master. This web application is licensed to many small businesses, each of which have a different email address for the web master. You have decided to use a context parameter that you specify in the deployment descriptor, like this:
 42. ＜context-param＞
 43. ＜param-name＞webmasterEmail＜/param-name＞
 44. ＜param-value＞master@example.com＜/param-value＞
 45. ＜/context-param＞
Which JSP code snippet creates this email link? (A) ＜a href='mailto:${contextParam.webmaterEmail}'＞contact us＜/a＞ (B) ＜a href='mailto:${applicationScope.webmaterEmail}'＞contact us＜/a＞ (C) ＜a href='mailto:${contextInitParam.webmaterEmail}'＞contact us＜/a＞ (D) ＜a href='mailto:${initParam.webmaterEmail}'＞contact us＜/a＞

105 Refer to the Exhibit.
5e991a8276998.jpg Assuming the tag library in the exhibit is imported with the prefix forum, which custom tag invocation procedures a transaction error in a jsp page? (A) ＜forum:message from="My Name" subject="My Subject" /＞ (B) ＜forum:message subject="My Subject"＞My message body.＜/forum:message＞ (C) ＜forum:message from="My Name" subject="${param.subject}"＞${param.body}＜/forum:message＞ (D) ＜forum:message from="My Name" subject="My Subject"＞＜%= request.getParameter( "body" ) %＞＜/forum:message＞ (E) ＜forum:message from="My Name"subject="＜%= request.getParameter( "subject" ) %＞"＞My message body.＜/forum:message＞

106 Which statement is true about web container session management? (A) Access to session-scoped attributes is guaranteed to be thread-safe by the web container. (B) To activate URL rewriting, the developer must use the HttpServletResponse.setURLRewriting method. (C) If the web application uses HTTPS, then the web container may use the data on the HTTPS request stream to identify the client. (D) The JSESSIONID cookie is stored permanently on the client so that a user may return to the web application and the web container will rejoin that session.
107 APIs for dynamically registering servlets and filters can be called at: (A) Context initialization time (B) Any time (C) There is no way to dynamically register servlets and filters (D) Context destruction time (E) Injected into a servlet context
108 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) ＜jsp:declaration＞int count = 0;＜jsp:declaration＞ (B) ＜%! int count = 0; %＞ (C) ＜jsp:declaration.instance＞int count = 0;＜jsp:declaration.instance＞ (D) ＜jsp:scriptlet.declaration＞int count = 0;＜jsp:scriptlet.declaration＞
複選題
109 A cookie may be set to be an HttpOnly cookie. Setting a cookie to be HttpOnly results in (Choose two) (A) Client to not expose the cookie to client side scripting code (B) Does not work with https protocol (C) prevent certain types of cross-site scripting attacks (D) There is no such thing as an HttpOnly cookie
複選題
110 Which two security mechanisms can be directed through a sub-element of the ＜user-dataconstraint＞ element in a web application deployment descriptor? (Choose two.) (A) authorization (B) data integrity (C) confidentiality (D) authentication
111 Users of your web application have requested that they should be able to set the duration of their sessions. So for example, one user might want a webapp to stay connected for an hour rather than the webapp's default of fifteen minutes; another user might want to stay connected for a whole day. Furthermore, you have a special login servlet that performs user authentication and retrieves the object from the database. You want to augment this code to set up the user's specified session duration. Which code snippet in the login servlet will accomplish this goal? (A) User user = / / retrieves the user objects object from the databasesession.setDurationInterval (user.getSessionDuration()); (B) User user = / / retrieves the User objects from the databasesession.setInactiveInterval (user.getSessionDuration()); (C) User user = / / retrieves the user objects object from the databasesession.setInactiveInterval (user.get.SessionDuration()); (D) User user = / / retrieves the user objects object from the databasesession.setDuration (user.getSessionDuration()); (E) User user = / / retrieves the user objects object from the databasesession.setMaxInactiveInterval (user.getSessionDuration());

112 View the exhibit.
5e991d792654b.jpg Assume the tag library in the exhibit is placed in a web application in the path /WEBINF/tld/example.tld.
1.
2. ＜ex:hello /＞
Which JSP code, inserted at line 1, completes the JSP code to invoke the hello tag? (A) ＜%@ taglib prefix="ex" uri="/WEB-INF/tld" %＞ (B) ＜%@ taglib uri="/WEB-INF/tld/example.tld" %＞ (C) ＜%@ taglib prefix="ex"uri:="http://localhost:8080/tld/example.tld" % ＞ (D) ＜%@ taglib prefix="ex"uri:="http://example.com/tld/example" % ＞

複選題
113 Given:
 3. class MyServlet extends HttpServlet {
 4. public void doPut(HttpServletRequest req,
    HttpServletResponse resp)
    throws ServletException, IOException {
 5. // servlet code here
...
 26. }
 27. }
If the DD contains a single security constraint associated with MyServlet and its only ＜http-method＞ tags and
＜auth-constraint＞ tags are:
＜http-method＞GET＜/http-method＞
＜http-method＞PUT＜/http-method＞
＜auth-constrain＞Admin＜/auth-constrain＞
Which four requests would be allowed by the container? (Choose four) (A) A user whose role is Admin can perform a PUT. (B) A user whose role is Admin can perform a GET. (C) A user whose role is Admin can perform a POST. (D) A user whose role is Member can perform a PUT. (E) A user whose role is Member can perform a POST.
複選題
114 Given a header in an HI IP request:
X-Retries: 4
A Which two retrieve the value of the header from a given HttpServletRequest request? (Choose two ) (A) request-getHeader("X-Retries") (B) request.getlntHeader("X-Retries") (C) request.getRequestHeader("X-Retries") (D) request.getHeaders{"X-Retries").get(0) (E) request.getRequestHeaders("X-Retries").get(0)
複選題
115 Your web application uses a simple architecture in which servlets handle requests and then forward to a JSP using a request dispatcher. You need to pass information calculated in the servlet to the JSP for view generation. This information must NOT be accessible to any other servlet, JSP or session in the webapp.
Which two techniques can you use to accomplish this goal? (Choose two) (A) Add attributes to the session object. (B) Add attributes on the request object. (C) Add parameters on the request object. (D) Use the pageContext object to add request attributes. (E) Add parameters to the JSP's URL when generating the request dispatcher.
複選題
116 A servlet class is injected with a JDBC data source. After injection has occurred, the servlet needs to create a cache out of some of the data in the database, so as to improve responsiveness. Which two methods can host the cache creation code? (Choose two) (A) Servlet.init() (B) Servlet.destroy() (C) A method annotated with @Init (D) A method annotated with @PostConstruct (E) A method annotated with @PreDestroy
117 Given the fragment from Java EE deployment descriptor:
341. ＜error-page＞
342. ＜exception-type＞java.lang.Throwable＜/exception-type＞
343. ＜location＞/mainError.jsp＜/location＞
344. ＜/error-page＞
345. ＜error-page＞
346. ＜exception-type＞java.lang.ClassCastException＜/exception-type＞
347. ＜location＞/castError.jsp＜/location＞
348. ＜/error-page＞
If the web application associated with the fragment above throws a ClassCastException. Which statement is true? (A) The deployment descriptor is invalid. (B) The container invokes mainError.jsp (C) The container invokes castError.jsp (D) Neither mainError.jsp nor castError.jsp is invoked.
複選題
118 You are creating a new ISP page and you need to execute some code that acts when thepage is first executed, but only once. Which three are possible mechanisms for performing this initialization code? (Choose three) (A) In the init method. (B) In the jspInit method. (C) In the constructor of the JSP's Java code. (D) In a JSP declaration, which includes an initializer block. (E) In a JSP declaration, which includes a static initializer block.
119 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
120 Which code snippet specifies the metadata for a servlet with:
(i) url mapping "/mytest"'
(ii) Initial parameter with name "debug" and value "10"'
(iii) Support asynchronous operation? (A) @WebServlet("/mytest")@InitParam(name-"debug" va1ue = "10")@Asynchronouspublic class TestServlet extends HttpServlet {} (B) @WebServlet ("/myset")@WebParam(name = "debug" value = "10")Public class testServlet {} (C) @WebServlet (urlPatterns = { / "mytest"},Initparams = {@InitParam (name = "debug", value = "10") }, supportAsync = true)public class TestServlet extends HttpServlet {} (D) @WebServlet (urlPatterns = { / "mytest"},Initparams = {@InitParam (name = "debug", value = "10") }, asyncSupported = true)public class TestServlet extends HttpServlet {} (E) @WebServlet (urlPatterns = { / "mytest"},Initparam = @WebInitParam (name = "debug", value "10"), supportAsync = true)public class testServlet {}
121 You are building JSP pages that have a set of menus that are visible based on a user's security role. These menus are hand-crafted by your web-design team; for example, the SalesManager role has a menu in the file /WEB-INF/html/sales-mgr-menu.html. Which JSP code snippet should be used to make this menu visible to the user? (A) ＜% if (request.isUserInRole ("SalesManager") ) { %＞＜%@ include file=' /WEB-INF/html/sales-mgr-menu.html' %＞＜% } %＞ (B) ＜jsp:if test= 'request.isUserInRole ("SalesManager") '＞＜%@ include file '/WEB-INF/html/sales-mgr-menu.html' /%＞＜/jsp:if＞ (C) ＜% if ( request.isUserInRole("SalesManager") ) { %＞＜jsp:include file='/WEB-INF/html/sales-mgr-menu.html' /＞＜% } %＞ (D) ＜jsp:if test= 'request.isUserInRole("SalesManager")'＞＜jsp:include file '/WEB-INF/html/sales-mgr-menu.html' /＞＜/jsp:if＞
122 In your web application, you need to execute a block of code whenever the session object is first created. Which design will accomplish this goal? (A) Create an HttpSessionListener class and implement the sessionInitialized method with that block of code. (B) Create an HttpSessionActivationListener class and implement the sessionCreated method with that block of code. (C) Create a Filter class, call the getSession(false) method, and if the result was null, then execute that block of code. (D) Create an HttpSessionListener class and implement the sessionCreated method with that block of code. (E) Create a Filter class, call the getSession(true) method, and if the result was NOT null, then execute that block of code.
123 A popular Ajax framework and its companion widget library contain several hundreds of files of different types (.js, .ess, .html). Your company has mandated that all its web applications use only specific versions of this framework approved by IT and repackaged internally as jar files. Furthermore, web applications should only include the entire jar, without subsetting or modification. Where should the framework's files be placed inside a jar file to enable this kind of reuse? (A) under resources (B) under META-INF/resources (C) under META-INF/web-contents (D) under WEB-INF/resources
124 Which JSTL code snippet can be used to import content from another web resource? (A) ＜c:import url = "foo.jsp"/＞ (B) ＜c:import page = "foo.jsp"/＞ (C) ＜c:include url = "foo.jsp"/＞ (D) ＜c:include page = "foo.jsp"/＞ (E) Importing cannot be done in JSTL. A standard action must be used instead.
125 A method call inside your servlet has thrown an IOException resulting from a lost network connection to a necessary resource. The servlet has determined that it will be unable to operate successfully for a few minutes, but expects to be able to resume operation after that period. How should this situation handled? (A) The servlet should re-throw the exception to the web container. (B) The servlet should throw a servletException to the web container. (C) The servlet should throw an unavailableException to the web container. (D) The servlet should redirect to an error page that reports the exception message. (E) The servlet should retry the request until the method returns successfully.
126 Which annotation enables a servlet to efficiently process requests of typo multipart/formdata that involve large files being uploaded by the client? (A) @AcceptMultipart (B) @MultiPartConfig (C) @MultiPartFormData (D) @WebServlet (multipart = true)
複選題
127 To add a servlet to a context that has not been declared either via annotation or via the descriptor, during context initialization time the following API can be used (Choose three.) (A) servletContext.addServlet("myServletName", "MyServlet"); (B) servletContext.addServlet( (＜Class extends Servlet＞)getClass().getClassLoader().getClassLoader().loaderClass("MyServlet")); (C) servletContext.addServlet(myServlet); (D) servletContext.addServlet( ("myServletName", ＜Class extends Servlet＞)gerClass().getClassLoader().loaderClass("myServlet")); (E) servletContext.addServlet("myServletName", MyServlet);
128 In ServletContext.getNamedDispatcher(string arg0) arg0 is the (A) url of a servlet relative to the ServletRequest (B) url of a servlet relative to the Context (C) name of a servlet (D) absolute url to any servlet in any Context
129 Given a web fragment jar file, where should we put the web fragment.xml inside the jar file? (A) WEB-INF (B) META-INF (C) WEB-INF/lib (D) WEB-INF/classes (E) META-INF/services
130 What XML snippet must be added to the web.xml deployment descriptor to mandate that the container use the SSL session facility to establish a session for a client? (A) ＜session-config＞＜tracking-mode＞SSL＜/tracking-mode＞＜/session-config＞ (B) ＜session-config＞＜tracking-mode＞COOKIE＜/tracking-mode＞＜tracking-mode＞SSL＜/trackingmode＞＜/ses (C) ＜session-config＞＜cookie-config＞＜secure＞true＜/secure＞＜/cookie-config＞＜trackingmode＞COOKIE＜/trac (D) ＜session-config＞＜cookie-config＞＜http-only＞true＜http-only＞＜/cookie-config＞＜trackingmode＞COOKIE＜
複選題

131 View the Exhibit.
5e991ef4aee67.jpg
 Which two technologies would be suitable for use as Front Controller elements? (Choose two) (A) JSP (B) Servlet (C) Filter (D) POJO (E) Custom Tag

132 Given the JavaBean class:
public class MyBean {
private Boolean roasted = false;
public MyBean () {}
public Boolean isRoasted () { returned roasted }
public void setRoasted (Boolean roasted) { this.roasted = roasted; ] }
Assume a controller has created an instance of this bean, called setRoasted (true), and inserted the bean into the application scope using the name "myBean".
A JSP contains these two tags:
＜jsp: useBean id = "aBean" class = "MyBean" scope = "page" \ /＞
＜jsp: getProprty name = "aBean" property = "roasted" \ /＞
Which is true? (A) the page will include the output false (B) the page will include the output true (C) the page will report that the property roasted does not exist (D) the page will report that the syntax of the useBean tag is incorrect (E) the page will report that the syntax of the getProperty tag ls incorrect

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