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

1. Your web application requires the ability to load and remove web files dynamically to the web container's file system. Which two HTTP methods are used to perform these actions?
(Choose two.)

A) DELETE
B) REMOVE
C) SEND
D) DESTROY
E) POST
F) PUT

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

3. You are building a Front Controller using a JSP page and you need to determine if the user's session has NOT been created yet and perform some special processing for this case. Which scriptlet code snippet will perform this test?

A) <% if ( request.getHttpSession(false) == null ) {
// special processing
} %>
B) <% if ( requestObject.getHttpSession(false) == null ) {
// special processing
} %>
C) <% if ( requestObject.getSession(false) == null ) {
// special processing
} %>
D) <% if ( request.getSession(false) == null ) {
// special processing
} %>

4. A custom tag is defined to take three attributes. Which two correctly invoke the tag within a
JSP page? (Choose two.)

A) <prefix:myTag>
< jsp:attribute ${"foo", "bar", "baz"} />
< /prefix:myTag>
B) <prefix:myTag>
< jsp:attribute a:foo b:bar c:baz />
< /prefix:myTag>
C) <prefix:myTag attributes={"foo","bar","baz"} />
D) <prefix:myTag>
< jsp:attribute a="foo" b="bar" c="baz"/>
< /prefix:myTag>
E) <prefix:myTag a="foo" b="bar" c="baz" />
F) <prefix:myTag jsp:attribute a="foo" b="bar" c="baz" />
G) <prefix:myTag>
< jsp:attribute name="a">foo</jsp:attribute>
< jsp:attribute name="b">bar</jsp:attribute>
< jsp:attribute name="c">baz</jsp:attribute>
< /prefix:myTag>

5. Given:
1 . <% int[] nums = {42,420,4200};
2 . request.setAttribute("foo", nums); %>
3 . ${5 + 3 lt 6}
4 . ${requestScope['foo'][0] ne 10 div 0}
5 . ${10 div 0}
What is the result?

A) An exception is thrown.
B) false true 0
C) true true Infinity
D) Compilation or translation fails.
E) false true
F) false true Infinity
G) true true

Solutions: