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Oracle 1Z0-858 Exam Syllabus Topics:

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

1. You are creating an error page that provides a user-friendly screen whenever a server exception occurs. You want to hide the stack trace, but you do want to provide the
exception's error message to the user so the user can provide it to the customer service agent at your company. Which EL code snippet inserts this error message into the error page?

A) Message: <b>${pageContext.exception.errorMessage}</b>
B) Message: <b>${pageContext.exception.message}</b>
C) Message: <b>${exception.message}</b>
D) Message: <b>${exception.errorMessage}</b>
E) Message: <b>${request.exception.errorMessage}</b>
F) Message: <b>${request.exception.message}</b>

2. One of the use cases in your web application uses many session-scoped attributes. At the end of the use case, you want to clear out this set of attributes from the session object. Assume that this static variable holds this set of attribute names:
201.
private static final Set<String> USE_CASE_ATTRS;
202.
static {
203.
USE_CASE_ATTRS.add("customerOID");
204.
USE_CASE_ATTRS.add("custMgrBean");
205.
USE_CASE_ATTRS.add("orderOID");
206.
USE_CASE_ATTRS.add("orderMgrBean");
207.
}
Which code snippet deletes these attributes from the session object?

A) for ( String attr : USE_CASE_ATTRS ) {
session.removeAttribute(attr);
}
B) session.deleteAllAttributes(USE_CASE_ATTRS);
C) session.removeAll(USE_CASE_ATTRS);
D) for ( String attr : USE_CASE_ATTRS ) {
session.deleteAttribute(attr);
}
E) for ( String attr : USE_CASE_ATTRS ) {
session.remove(attr);
}

3. Which implicit object is used in a JSP page to retrieve values associated with <contextparam> entries in the deployment descriptor?

A) session
B) request
C) config
D) application

4. A developer is designing a multi-tier web application and discovers a need to hide the details of establishing and maintaining remote communications from the client. In addition, the application needs to find, in a transparent manner, the heterogeneous business components used to service the client's requests. Which design patterns, working together, address these issues?

A) Intercepting Filter and Transfer Object
B) Front Controller and Business Delegate
C) Business Delegate and Transfer Object
D) Business Delegate and Service Locator
E) Model-View-Controller and Intercepting Filter

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

Solutions: