Simulate the real exam

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

1. A developer has created a web application that includes a servlet for each use case in the application. These servlets have become rather difficult to maintain because the request processing methods have become very large. There is also common processing code in many servlets because these use cases are very similar. Which two design patterns can be used together to refactor and simplify this web application? (Choose two.)

A) View Helper
B) Session Facade
C) Proxy
D) Front Controller
E) Business Delegate
F) Model-View-Controller

2. Which is a benefit of precompiling a JSP page?

A) It avoids execution of the _jspService method on the first request.
B) It provides better performance on the first request for the JSP page.
C) It provides the ability to debug runtime errors in the application.
D) It avoids initialization on the first request.

3. DRAG DROP
Click the Task button.
Given a servlet mapped to /control, place the correct URI segment returned as a String on the corresponding HttpServletRequest method call for the URI:
/myapp/control/processorder.

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

5. Given the JSP code:
< % request.setAttribute("foo", "bar"); %>
and the Classic tag handler code:
5 . public int doStartTag() throws JspException {
6 . // insert code here
7 . // return int
8 . }
Assume there are no other "foo" attributes in the web application.
Which invocation on the pageContext object, inserted at line 6, assigns "bar" to the variable x?

A) String x = (String) pageContext.getAttribute("foo");
B) String x = (String)
pageContext.getRequest().getAttribute("foo");
C) It is NOT possible to access the pageContext object from within doStartTag.
D) String x = (String) pageContext.getRequestScope("foo");
E) String x = (String) pageContext.getAttribute("foo",
PageContext.ANY_SCOPE);

Solutions: