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

1. Given the security constraint in a DD:
101.
<security-constraint>
102.
<web-resource-collection>
103.
<web-resource-name>Foo</web-resource-name>
104.
<url-pattern>/Bar/Baz/*</url-pattern>
105.
<http-method>POST</http-method>
106.
</web-resource-collection>
107.
<auth-constraint>
108.
<role-name>DEVELOPER</role-name>
109.
</auth-constraint>
110.
</security-constraint>
And given that "MANAGER" is a valid role-name, which four are true for this security constraint? (Choose four.)

A) DEVELOPER can do a TRACE on any resource in the /Bar/Baz directory.
B) DEVELOPER can do a GET on resources in the /Bar/Baz directory.
C) DEVELOPER can do only a POST on resources in the /Bar/Baz directory.
D) MANAGER can do a TRACE on any resource in the /Bar/Baz directory.
E) MANAGER can do a GET on resources in the /Bar/Baz directory.
F) MANAGER can do a POST on any resource in the /Bar/Baz directory.

2. You have been contracted to create a web site for a free dating service. One feature is the ability for one client to send a message to another client, which is displayed in the latter
client's private page. Your contract explicitly states that security is a high priority. Therefore, you need to prevent cross-site hacking in which one user inserts JavaScript code that is then rendered and invoked when another user views that content. Which two JSTL code snippets will prevent cross-site hacking in the scenario above? (Choose two.)

A) <c:out value='${message}' escapeXml='true' />
B) <c:out>${message}</c:out>
C) <c:out value='${message}' eliminateXml='true' />
D) <c:out eliminateXml='true'>${message}</c:out>
E) <c:out value='${message}' />

3. You are creating a servlet that generates stock market graphs. You want to provide the web browser with precise information about the amount of data being sent in the response stream. Which two HttpServletResponse methods will you use to provide this information? (Choose two.)

A) response.setHeader("Length", numberOfBytes);
B) response.setHeader("Content-Length", numberOfBytes);
C) response.setContentLength(numberOfBytes);
D) response.setLength(numberOfBytes);
E) response.setIntHeader("Length", numberOfBytes);
F) response.setIntHeader("Content-Length", numberOfBytes);

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

5. You want to create a filter for your web application and your filter will implement javax.servlet.Filter.
Which two statements are true? (Choose two.)

A) Your filter class must implement an init method and a destroy method.
B) The method that your filter invokes on the object it received that implements javax.servlet.FilterChain can invoke either another filter or a servlet.
C) Your filter class must implement a doFilter method that takes, among other things, an HTTPServletRequest object and an HTTPServletResponse object.
D) Your filter class must also implement javax.servlet.FilterChain.
E) When your filter chains to the next filter, it should pass the same arguments it received in its doFilter method.

Solutions: