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

1. Given an HttpServletRequest request and HttpServletResponse response, which sets a cookie "username" with the value "joe" in a servlet?

A) request.setCookie("username", "joe")
B) response.addCookie(new Cookie("username", "joe"))
C) response.addHeader(new Cookie("username", "joe"))
D) response.addCookie("username", "joe")
E) request.addCookie("username", "joe")
F) request.addHeader(new Cookie("username", "joe"))
G) request.addCookie(new Cookie("username", "joe"))

2. In a JSP-centric shopping cart application, you need to move a client's home address of the Customer object into the shipping address of the Order object. The address data is stored in a value object class called Address with properties for: street address, city, province, country, and postal code. Which two JSP code snippets can be used to accomplish this goal? (Choose two.)

A) <jsp:setProperty name='${order}' property='shipAddress'
value='${client.homeAddress}' />
B) <c:set target='${order}' property='shipAddress'
value='${client.homeAddress}' />
C) <c:setProperty name='${order}' property='shipAddress'>
< jsp:getProperty name='client' property='homeAddress' />
< /c:setProperty>
D) <c:set target='${order}' property='shipAddress'>
< jsp:getProperty name='client' property='homeAddress' />
< /c:set>
E) <c:set var='order' property='shipAddress'>
< jsp:getProperty name='client' property='homeAddress' />
< /c:store>
F) <c:set var='order' property='shipAddress'
value='${client.homeAddress}' />

3. DRAG DROP
Click the Task button.
Place the appropriate element names on the left on the web application deployment descriptor on the right so that files ending in ".mpg" are associated with the MIME type
"video/mpeg."

4. You have created a JSP that includes instance variables and a great deal of scriptlet code.
Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP scriptlet code. To fix these problems would require significant recoding, but you are already behind schedule. Which JSP code snippet can you use to resolve these concurrency problems?

A) <%@ page implements='SingleThreadModel' %>
B) <%@ page isThreadSafe='false' %>
C) <%! implements SingleThreadModel %>
D) <%@ implements SingleThreadModel %>
E) <%@ page useSingleThreadModel='true' %>

5. The Squeaky Beans Inc. shopping application was initially developed for a non-distributed environment. The company recently purchased the Acme Application Server, which supports distributed HttpSession objects. When deploying the application to the server, the deployer marks it as distributable in the web application deployment descriptor to take advantage of this feature.
Given this scenario, which two must be true? (Choose two.)

A) Storing references to Enterprise JavaBeans components in the HttpSession object might
NOT be supported by J2EE web containers.
B) The J2EE web container must support migration of objects that implement Serializable.
C) The J2EE web container must use the native JVM Serialization mechanism for distributing HttpSession objects.
D) As per the specification, the J2EE web container ensures that distributed HttpSession objects will be stored in a database.

Solutions: