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SUN 310-083 Exam Syllabus Topics:

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

Question 1

A developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition, because the business and resource tiers are distributed, the application needs to minimize the inter-tier network traffic related to servicing client requests. Which design patterns, working together, address these issues?

A. Model-View-Controller and Intercepting Filter
B. Business Delegate and Intercepting Filter
C. Front Controller and Transfer Object
D. Business Delegate and Transfer Object
E. Front Controller and Service Locator

Question 2

You need to create a servlet filter that stores all request headers to a database for all requests to the web application's home page "/index.jsp". Which HttpServletRequest method allows you to retrieve all of the request headers?

A. String[] getHeaderNames()
B. String[] getRequestHeaders()
C. java.util.Iterator getRequestHeaders()
D. java.util.Enumeration getRequestHeaders()
E. java.util.Iterator getHeaderNames()
F. java.util.Enumeration getHeaderNames()

Question 3

A developer has used this code within a servlet:
62. if(request.isUserInRole("vip")) {
63. // VIP-related logic here
64. }
What else must the developer do to ensure that the intended security goal is achieved?

A. define a group within the security realm and call it vip
B. declare a security-role-ref for vip in the deployment descriptor
C. create a user called vip in the security realm
D. define a security-role named vip in the deployment descriptor

Question 4

For debugging purposes, you need to record how many times a given JSP is invoked before the user's session has been created. The JSP's destroy method stores this information to a database. Which JSP code snippet keeps track of this count for the lifetime of the JSP page?

A. <% int count = 0;
if ( request.getSession(false) == null ) count++; %>
B. <%@ int count = 0; %>
< % if ( request.getSession(false) == null ) count++; %>
C. <%! int count = 0;
if ( request.getSession(false) == null ) count++; %>
D. <%! int count = 0; %>
< % if ( request.getSession(false) == null ) count++; %>
E. <%@ int count = 0;
if ( request.getSession(false) == null ) count++; %>

Question 5

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

Solutions: