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SUN 310-083 Exam Syllabus Topics:

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

Question 1

You have built a web application that you license to small businesses. The webapp uses a context parameter, called licenseExtension, which enables certain advanced features based on your client's license package. When a client pays for a specific service, you provide them with a license extension key that they insert into the <context-param> of the deployment descriptor. Not every client will have this context parameter so you need to create a context listener to set up a default value in the licenseExtension parameter. Which code snippet will accomplish this goal?

A. String ext = context.getParameter('licenseExtension');
if ( ext == null ) {
context.setParameter('licenseExtension', DEFAULT);
}
B. String ext = context.getInitParameter('licenseExtension');
if ( ext == null ) {
context.resetInitParameter('licenseExtension', DEFAULT);
}
C. You cannot do this because context parameters CANNOT be altered programmatically.
D. String ext = context.getInitParameter('licenseExtension');
if ( ext == null ) {
context.setInitParameter('licenseExtension', DEFAULT);
}
E. String ext = context.getAttribute('licenseExtension');
if ( ext == null ) {
context.setAttribute('licenseExtension', DEFAULT);
}

Question 2

Given the definition of MyServlet:
1 1. public class MyServlet extends HttpServlet {
1 2. public void service(HttpServletRequest request,
1 3. HttpServletResponse response)
1 4. throws ServletException, IOException {
1 5. HttpSession session = request.getSession();
1 6 session.setAttribute("myAttribute","myAttributeValue");
1 7. session.invalidate();
1 8. response.getWriter().println("value=" +
1 9. session.getAttribute("myAttribute"));
2 0. }
2 1. }
What is the result when a request is sent to MyServlet?

A. The string "value=myAttributeValue" appears in the response stream.
B. The string "value=null" appears in the response stream.
C. An InvalidSessionException is thrown at runtime.
D. An IllegalStateException is thrown at runtime.

Question 3

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

Question 4

Click the Exhibit button.
Assuming the tag library in the exhibit is imported with the prefix stock, which custom tag invocation outputs the contents of the variable exposed by the quote tag?

A. <stock:quote symbol="SUNW" var="quote" />
$ {quote}
B. <stock:quote symbol="SUNW" />
$ {var}
C. <stock:quote symbol="SUNW">
${var}
< /stock:quote>
D. <stock:quote symbol="SUNW" var="quote">
< %= quote %>
< /stock:quote>
E. ${var}
< stock:quote symbol="SUNW" />

Question 5

What is true about Java EE authentication mechanisms?

A. If your deployment descriptor correctly declares an authentication type of BASIC, the container automatically requests a user name and password whenever a user starts a new session.
B. To use Java EE FORM authentication, you must declare two HTML files in your deployment descriptor, and you must use a predefined action in the HTML file that handles your user's login.
C. If you want your web application to support the widest possible array of browsers, and you want to perform authentication, the best choice of Java EE authentication mechanisms is DIGEST.
D. If your deployment descriptor correctly declares an authentication type of
CLIENT_CERT, your users must have a certificate from an official source before they can use your application.

Solutions: