SUN 310-083 Actual PDF : Sun Certified Web Component Developer for J2EE 5

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SUN 310-083 Exam Syllabus Topics:

SUN Sun Certified Web Component Developer for J2EE 5 Sample Questions:

1. Given:
6. <myTag:foo bar='42'>
7. <%="processing" %>
8. </myTag:foo>
and a custom tag handler for foo which extends TagSupport.
Which two are true about the tag handler referenced by foo? (Choose two.)

A) The doAfterBody method is NOT called.
B) The doStartTag method is called once.
C) The SKIP_PAGE constant is a valid return value for the doStartTag method.
D) The EVAL_BODY_BUFFERED constant is a valid return value for the doStartTag method.
E) The EVAL_PAGE constant is a valid return value for the doEndTag method.

2. Your web site has many user-customizable features, for example font and color preferences on web pages. Your IT department has already built a subsystem for user preferences using Java SE's lang.util.prefs package APIs and you have been ordered to reuse this subsystem in your web application. You need to create an event listener that stores the user's Preference object when an HTTP session is created. Also, note that user identification information is stored in an HTTP cookie.
Which partial listener class can accomplish this goal?

A) public class UserPrefLoader implements SessionListener {
public void sessionInitialized(SessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().addAttribute("prefs", userPrefs);
}
// more code here
}
B) public class UserPrefLoader implements HttpSessionListener {
public void sessionInitialized(HttpSessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getHttpSession().setAttribute("prefs", userPrefs);
}
// more code here
}
C) public class UserPrefLoader implements HttpSessionListener {
public void sessionCreated(HttpSessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getServletContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().setAttribute("prefs", userPrefs);
}
// more code here
}
D) public class UserPrefLoader implements SessionListener {
public void sessionCreated(SessionEvent se) {
MyPrefsFactory myFactory = (MyPrefsFactory)
se.getContext().getAttribute("myPrefsFactory");
User user = getUserFromCookie(se);
myFactory.setThreadLocalUser(user);
Preferences userPrefs = myFactory.userRoot();
se.getSession().addAttribute("prefs", userPrefs);
}
// more code here
}

3. Click the Exhibit button.
Assuming the tag library in the exhibit is imported with the prefix forum, which custom tag invocation produces a translation error in a JSP page?

A) <forum:message from="My Name" subject="My Subject">
< %= request.getParameter( "body" ) %>
< /forum:message>
B) <forum:message from="My Name"
subject="<%= request.getParameter( "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" />
E) <forum:message subject="My Subject">
My message body.
< /forum:message>

4. 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? (Choose two.)

A) long customerOID = 47L;
session.setAttribute("customerOID", customerOID);
B) long customerOID = 47L;
session.setLongAttribute("customerOID", new Long(customerOID));
C) long customerOID = 47L;
session.setAttribute("customerOID", new Long(customerOID));
D) long customerOID = 47L;
session.setNumericAttribute("customerOID", new Long(customerOID));
E) long customerOID = 47L;
session.setNumericAttribute("customerOID", customerOID);
F) long customerOID = 47L;
session.setLongAttribute("customerOID", customerOID);

5. To take advantage of the capabilities of modern browsers that use web standards, such as
XHTML and CSS, your web application is being converted from simple JSP pages to JSP
Document format. However, one of your JSPs, /scripts/screenFunctions.jsp, generates a
JavaScript file. This file is included in several web forms to create screen-specific validation functions and are included in these pages with the following statement:
1 0. <head>
1 1. <script src='/scripts/screenFunctions.jsp'
1 2. language='javascript'
1 3. type='application/javascript'> </script>
1 4. </head>
1 5. <!-- body of the web form -->
Which JSP code snippet declares that this JSP Document is a JavaScript file?

A) <jsp:document contentType='application/javascript' />
B) <jsp:directive.page contentType='application/javascript' />
C) No declaration is needed because the web form XHTML page already declares the
MIME type of the /scripts/screenFunctions.jsp file in the <script> tag.
D) <jsp:page contentType='application/javascript' />
E) <%@ page contentType='application/javascript' %>

Solutions: