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SUN 310-083 Exam Syllabus Topics:

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

1. Which ensures that a JSP response is of type "text/plain"?

A) <% response.setEncoding("text/plain"); %>
B) <%@ page mimeType="text/plain" %>
C) <%@ page contentEncoding="text/plain" %>
D) <% response.setMimeType("text/plain"); %>
E) <%@ page pageEncoding="text/plain" %>
F) <%@ page contentType="text/plain" %>

2. 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 must add the string id=<sessionid> to the end of every URL to ensure that the conversation with the browser can continue.
C) The developer can ignore this issue. Web containers are required to support automatic
URL rewriting when cookies are not supported.
D) The developer must ensure that every URL is properly encoded using the appropriate
URL rewriting APIs.

3. Given the two security constraints in a deployment descriptor:
1 01. <security-constraint>
1 02. <!--a correct url-pattern and http-method goes here-->
1 03. <auth-constraint><role-name>SALES</role-name></auth-
1 03. <auth-constraint>
1 04. <role-name>SALES</role-name>
1 05. </auth-constraint>
1 06. </security-constraint>
1 07. <security-constraint>
1 08. <!--a correct url-pattern and http-method goes here-->
1 09. <!-- Insert an auth-constraint here -->
1 10. </security-constraint>
If the two security constraints have the same url-pattern and http-method, which two, inserted independently at line 109, will allow users with role names of either SALES or
MARKETING to access this resource? (Choose two.)

A) <auth-constraint/>
B) <auth-constraint>
< role-name>*</role-name>
< /auth-constraint>
C) <auth-constraint>
< role-name>MARKETING</role-name>
< /auth-constraint>
D) <auth-constraint>
< role-name>ANY</role-name>
< /auth-constraint>

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

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

Solutions: