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

1. DRAG DROP
Click the Task button.
A servlet context listener loads a list of com.example.Product objects from a database and stores that list into the catalog attribute of the ServletContext object.
Place code snippets to construct a jsp:useBean standard action to access this catalog.

2. Given a portion of a valid Java EE web application's directory structure:
MyApp
|
|-- Directory1
| |-- File1.html
|
|-- META-INF
| |-- File2.html
|
|-- WEB-INF
|-- File3.html
You want to know whether File1.html, File2.html, and/or File3.html is protected from direct access by your web client's browsers.
What statement is true?

A) Only File2.html is directly accessible.
B) Only File1.html and File2.html are directly accessible.
C) All three files are directly accessible.
D) Only File1.html and File3.html are directly accessible.
E) Only File2.html and File3.html are directly accessible.
F) Only File3.html is directly accessible.
G) Only File1.html is directly accessible.

3. Your web application uses a simple architecture in which servlets handle requests and then forward to a JSP using a request dispatcher. You need to pass information calculated by the servlet to the JSP; furthermore, that JSP uses a custom tag and must also process this information. This information must NOT be accessible to any other servlet, JSP or session in the webapp. How can you accomplish this goal?

A) Store the data in a public instance variable in the servlet.
B) Add an attribute to the request object before using the request dispatcher.
C) This CANNOT be done as the tag handler has no means to extract this data.
D) Add an attribute to the context object before using the request dispatcher.

4. Which two classes or interfaces provide a getSession method? (Choose two.)

A) javax.servlet.http.HttpServletResponse
B) javax.servlet.http.HttpServletRequest
C) javax.servlet.http.HttpSessionBindingEvent
D) javax.servlet.http.HttpSessionContext
E) javax.servlet.http.HttpSessionAttributeEvent

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

Solutions: