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 attributecalled headline of type com.example.Headline containing details for that headline. item Outputs the HTMLfor a single news headline. Accepts an attribute info of typecom.example.Headline containing details for theheadline to be rendered.
Which snippet of JSP code returns the latest news headlines in an HTML table,one per row?()
A.
B.
C.
D.
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One of the use cases in your web application uses many session-scoped attributes. At the end of the usecase, you want to clear out this set of attributes from the session object. Assume that this static variableholds this set of attribute names:
201.private static final Set<String> USE_CASE_ATTRS;
202.static {
203.USE_CASE_ATTRS.add("customerOID");
204.USE_CASE_ATTRS.add("custMgrBean");
205.USE_CASE_ATTRS.add("orderOID");
206.USE_CASE_ATTRS.add("orderMgrBean");
207.}
Which code snippet deletes these attributes from the session object?()
A.session.removeAll(USE_CASE_ATTRS);
B.for( String attr : USE_CASE_ATTRS ){ session.remove(attr); }
C.for( String attr : USE_CASE_ATTRS ){session.removeAttribute(attr);}
D.for( String attr : USE_CASE_ATTRS ){session.deleteAttribute(attr);}
E.session.deleteAllAttributes(USE_CASE_ATTRS);
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.
Your web application requires the adding and deleting of many session attributes during a complex usecase. A bug report has come in that indicates that an important session attribute is being deleted too soonand a NullPointerException is being thrown several interactions after the fact. You have decided to create asession event listener that will log when attributes are being deleted so you can track down when theattribute is erroneously being deleted.
Which listener class will accomplish this debugging goal?()
A.Create an HttpSessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getName method on the event object.
B.Create an HttpSessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getName method on the event object.
C.Create an SessionAttributeListener class and implement the attributeRemoved method and log the attribute name using the getAttributeName method on the event object.
D.Create an SessionAttributeListener class and implement the attributeDeleted method and log the attribute name using the getAttributeName method on the event object.
You need to store a Java long primitive attribute, called customerOID, into the session scope.
Which two code snippets allow you to insert this value into the session?()
A.long customerOID = 47L;session.setAttribute("customerOID", new Long(customerOID));
B.long customerOID = 47L;session.setLongAttribute("customerOID", new Long(customerOID));
C.long customerOID = 47L;session.setAttribute("customerOID", customerOID);
D.long customerOID = 47L;session.setNumericAttribute("customerOID", new Long(customerOID));
Given the definition of MyServlet:
11.public class MyServlet extends HttpServlet {
12.public void service(HttpServletRequest request,
13.HttpServletResponse response)
14.throws ServletException, IOException {
15.HttpSession session = request.getSession();
16.session.setAttribute("myAttribute","myAttributeValue");
17.session.invalidate();
18.response.getWriter().println("value=" +
19.session.getAttribute("myAttribute"));
20.}
21.}
What is the result when a request is sent to MyServlet?()
A.An IllegalStateException is thrown at runtime.
B.An InvalidSessionException is thrown at runtime.
C.The string "value=null" appears in the response stream.
D.The string "value=myAttributeValue" appears in the response stream.
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Click the ’Select and Place’ button.Place the events in the order they occur.
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You are building a dating web site. The client’s date of birth is collected along with lots of other information.The Person class has a derived method, getAge():int, which returns the person’s age calculated from thedate of birth and today’s date. In one of your JSPs you need to print a special message to clients within theage group of 25 through 35.Which two EL code snippets will return true for this condition? ()
Your IT department is building a lightweight Front Controller servlet that invokes an application logic objectwith the interface:public interface ApplicationController {public String invoke(HttpServletRequest request)}The return value of this method indicates a symbolic name of the next view. From this name, the FrontController servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or apath relative to the current request. Next, the Front Controller servlet must send the request to this JSP togenerate the view. Assume that the servlet variable request is assigned the current HttpServletRequestobject and the variable context is assigned the webapp’s ServletContext. Which code snippet of the FrontController servlet accomplishes this goal?()
In which three directories, relative to a web application’s root, may a tag library descriptor file reside whendeployed directly into a web application?()
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