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Oracle 1Z0-858 Exam Syllabus Topics:

Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:

1. For manageability purposes, you have been told to add a "count" instance variable to a critical JSP Document so that a JMX MBean can track how frequent this JSP is being invoked. Which JSP code snippet must you use to declare this instance variable in the JSP Document?

A) <jsp:declaration.instance> int count = 0; <jsp:declaration.instance>
B) <jsp:scriptlet.declaration> int count = 0; <jsp:scriptlet.declaration>
C) <%! int count = 0; %>
D) <jsp:declaration> int count = 0; <jsp:declaration>

2. Given: http://com.example/myServlet.jsp?num=one&num=two&num=three Which two produce the output "one, two and three"? (Choose two.)

A) ${paramValues["num"][0]}, ${paramValues["num"][1]} and ${paramValues["num"][2]}
B) ${param.num[0],[1] and [2]}
C) ${param.num[0]}, ${param.num[1]} and ${param.num[2]}
D) ${paramValues[0],[1] and [2]}
E) ${parameterValues.num[0]}, ${parameterValues.num[1]} and ${parameterValues.num[2]}
F) ${parameterValues["num"]["0"]}, ${parameterValues["num"]["1"]} and ${parameterValues["num"]["2"]}
G) ${paramValues.num[0]}, ${paramValues.num[1]} and ${paramValues.num[2]}

3. A developer chooses to avoid using SingleThreadModel but wants to ensure that data is updated in a thread-safe manner. Which two can support this design goal? (Choose two.)

A) Store the data in the HttpSession object.
B) Store the data in a local variable.
C) Store the data in the ServletRequest object.
D) Store the data in the ServletContext object.
E) Store the data in an instance variable.

4. Given a Filter class definition with this method:
21.
public void doFilter(ServletRequest request,
22.
ServletResponse response,
23.
FilterChain chain)
24.
throws ServletException, IOException {
25.
// insert code here
26.
}
Which should you insert at line 25 to properly invoke the next filter in the chain, or the target servlet if there are no more filters?

A) request.forward(request, response);
B) chain.forward(request, response);
C) chain.doFilter(request, response);
D) request.doFilter(request, response);

5. Which two statements are true about the security-related tags in a valid Java EE deployment descriptor? (Choose two.)

A) Every <security-constraint> tag must have at least one <http-method> tag.
B) A <security-constraint> tag can have many <web-resource-collection> tags.
C) A given <web-resource-collection> tag can contain from zero to many <url-pattern> tags.
D) A given <auth-constraint> tag can apply to only one <web-resource-collection> tag.
E) It is possible to construct a valid <security-constraint> tag such that, for a given resource, no user roles can access that resource.

Solutions: