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

1. Given the web application deployment descriptor elements:
11.
<filter>
12.
<filter-name>ParamAdder</filter-name>
13.
<filter-class>com.example.ParamAdder</filter-class>
14.
</filter> ...
24.
<filter-mapping>
25.
<filter-name>ParamAdder</filter-name>
26.
<servlet-name>MyServlet</servlet-name>
27.
<!-- insert element here -->
28.
</filter-mapping>
Which element, inserted at line 27, causes the ParamAdder filter to be applied when MyServlet is invoked by another servlet using the RequestDispatcher.include method?

A) <dispatcher>INCLUDE</dispatcher>
B) <include/>
C) <dispatcher>include</dispatcher>
D) <filter-condition>INCLUDE</filter-condition>
E) <filter-condition>include</filter-condition>

2. Given:
10.
public void service(ServletRequest request,
11.
ServletResponse response) {
12.
ServletInputStream sis =
13.
// insert code here
14.
}
Which retrieves the binary input stream on line 13?

A) request.getResourceAsStream(ServletRequest.REQUEST);
B) request.getResourceAsStream();
C) request.getInputStream();
D) request.getWriter();
E) request.getReader();

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

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

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

5. Which two about WAR files are true? (Choose two.)

A) WAR files must contain the web application deployment descriptor.
B) The web container must serve the content of any META-INF directory located in a WAR file.
C) WAR files must be located in the web application library directory.
D) The web container must allow access to resources in JARs in the web application library directory.
E) WAR files must be created by using archive tools designed specifically for that purpose.

Solutions: