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

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

1. A custom JSP tag must be able to support an arbitrary number of attributes whose names are unknown when the tag class is designed. Which two are true? (Choose two.)

A) The <dynamic-attributes>true</dynamic-attributes> element must appear in the echo tag TLD.
B) The class implementing the echo tag handler must implement the
javax.servlet.jsp.tagext.IterationTag interface.
C) The <body-content> element in the echo tag TLD must have the value JSP.
D) The echo tag handler must define the setAttribute(String key, String value) method.
E) The class implementing the echo tag handler must implement the
javax.servlet.jsp.tagext.DynamicAttributes interface.

2. Given an HttpServletRequest request:
2 2. String id = request.getParameter("jsessionid");
2 3. // insert code here
2 4. String name = (String) session.getAttribute("name");
Which three can be placed at line 23 to retrieve an existing HttpSession object? (Choose three.)

A) HttpSession session = request.getSession();
B) HttpSession session = request.getSession(true);
C) HttpSession session = request.getSession(false);
D) HttpSession session = request.getSession("jsessionid");
E) HttpSession session = request.getSession(id);

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

4. A web browser need NOT always perform a complete request for a particular page that it suspects might NOT have changed. The HTTP specification provides a mechanism for the browser to retrieve only a partial response from the web server; this response includes information, such as the Last-Modified date but NOT the body of the page. Which HTTP method will the browser use to retrieve such a partial response?

A) SEND
B) TRACE
C) OPTIONS
D) ASK
E) HEAD
F) GET

5. Click the Exhibit button.
A session-scoped attribute, product, is stored by a servlet. That servlet then forwards to a
JSP page. This attribute holds an instance of the com.example.Product class with a name property of "The Matrix" and price property of 39.95.
Given the JSP page code snippet:
1 . <jsp:useBean id='product' class='com.example.Product'>
2 . <jsp:setProperty name='product' property='price' value='49.95'/>
3 . </jsp:useBean>
4 . <%= product.getName() %> costs <%= product.getPrice() %>
What is the response output of this JSP page code snippet?

A) Default costs 49.95
B) Default costs 39.95
C) The Matrix costs 0.0
D) Default costs 0.0
E) The Matrix costs 49.95
F) The Matrix costs 39.95

Solutions: