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

1. A developer for the company web site has been told that users may turn off cookie support in their browsers. What must the developer do to ensure that these customers can still use the web application?

A) The developer must provide an alternate mechanism for managing sessions and abandon the HttpSession mechanism entirely.
B) The developer can ignore this issue. Web containers are required to support automatic URL rewriting when cookies are not supported.
C) The developer must ensure that every URL is properly encoded using the appropriate URL rewriting APIs.
D) The developer must add the string ?id=<sessionid> to the end of every URL to ensure that the conversation with the browser can continue.

2. You are designing an n-tier Java EE application. You have already decided that some of your JSPs will need to get data from a Customer entity bean. You are trying to decide
whether to use a Customer stub object or a Transfer Object. Which two statements are true? (Choose two.)

A) In both cases, the JSPs can use EL expressions to get data.
B) The stub will increase the logic necessary in the JSPs.
C) Using the stub approach allows you to design the application without using a Service Locator.
D) The Transfer Object will decrease data staleness.
E) The stub will increase network traffic.
F) Only the Transfer Object will need to use a Business Delegate.

3. Click the Exhibit button.
As a maintenance feature, you have created this servlet to allow you to upload and remove files on your web server. Unfortunately, while testing this servlet, you try to upload a file using an HTTP request and on this servlet, the web container returns a 404 status.
What is wrong with this servlet?

A) The doPut and doDelete methods do NOT map to the proper HTTP methods.
B) The servlet constructor must NOT have any parameters.
C) HTTP does NOT support file upload operations.
D) The servlet needs a service method to dispatch the requests to the helper methods.

4. Which two from the web application deployment descriptor are valid? (Choose two.)

A) <error-page>
<exception-type>java.lang.Throwable</exception-type>
<location>/error.html</location>
</error-page>
B) <error-page>
<exception-type>*</exception-type>
<location>/error.html</location>
</error-page>
C) <error-page>
<exception-type>NullPointerException</exception-type>
<location>/error.html</location>
</error-page>
D) <error-page>
<exception-type>java.io.IOException</exception-type>
<location>/error.html</location>
</error-page>
E) <error-page>
<exception-type>java.lang.Error</exception-type>
<location>/error.html</location>
</error-page>

5. Which two JSTL URL-related tags perform URL rewriting? (Choose two.)

A) link
B) param
C) url
D) redirect
E) import

Solutions: