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

1. Given that a web application consists of two HttpServlet classes, ServletA and ServletB, and the ServletA.service method:
20.
String key = "com.example.data";
21.
session.setAttribute(key, "Hello");
22.
Object value = session.getAttribute(key);
23.
Assume session is an HttpSession, and is not referenced anywhere else in ServletA.
Which two changes, taken together, ensure that value is equal to "Hello" on line 23? (Choose two.)

A) enclose lines 21-22 in a synchronized block:
synchronized(this) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
B) ensure that the ServletA.service method is synchronized
C) ensure that ServletB synchronizes on the session object when setting session attributes
D) enclose lines 21-22 in a synchronized block:
synchronized(session) {
session.setAttribute(key, "Hello");
value = session.getAttribute(key);
}
E) ensure that the ServletB.service method is synchronized

2. You have created a web application that you license to real estate brokers. The webapp is highly customizable including the email address of the broker, which is placed on the footer of each page. This is configured as a context parameter in the deployment descriptor:
10.
<context-param>
11.
<param-name>footerEmail</param-name>
12.
<param-value>[email protected]</param-value>
13.
</context-param>
Which EL code snippet will insert this context parameter into the footer?

A) <a href='mailto:${contextParam.footerEmail}'>Contact me</a>
B) <a href='mailto:${footerEmail}'>Contact me</a>
C) <a href='mailto:${initParam@footerEmail}'>Contact me</a>
D) <a href='mailto:${initParam.footerEmail}'>Contact me</a>
E) <a href='mailto:${contextParam@footerEmail}'>Contact me</a>

3. A developer is designing a web application that must support multiple interfaces, including:
an XML web service for B2B HTML for web-based clients WML for wireless customers
Which design pattern provides a solution for this problem?

A) Model-View-Controller
B) Data Access Object
C) Business Delegate
D) Chain of Responsibility
E) Session Facade

4. Given an HttpServletRequest request and HttpServletResponse response, which sets a cookie "username" with the value "joe" in a servlet?

A) response.addHeader(new Cookie("username", "joe"))
B) response.addCookie("username", "joe")
C) request.setCookie("username", "joe")
D) request.addHeader(new Cookie("username", "joe"))
E) request.addCookie("username", "joe")
F) response.addCookie(new Cookie("username", "joe"))
G) request.addCookie(new Cookie("username", "joe"))

5. Click the Exhibit button.
Assuming the tag library in the exhibit is imported with the prefix stock, which custom tag invocation outputs the contents of the variable exposed by the quote tag?

A) ${var}
<stock:quote symbol="SUNW" />
B) <stock:quote symbol="SUNW">
${var}
</stock:quote>
C) <stock:quote symbol="SUNW" var="quote">
<%= quote %> </stock:quote>
D) <stock:quote symbol="SUNW" var="quote" />
${quote}
E) <stock:quote symbol="SUNW" />
${var}

Solutions: