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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 ensure that every URL is properly encoded using the appropriate URL rewriting APIs.
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 provide an alternate mechanism for managing sessions and abandon the HttpSession mechanism entirely.

2. Given:
11.
<% java.util.Map map = new java.util.HashMap();
12.
request.setAttribute("map", map);
13.
map.put("a", "b");
14.
map.put("b", "c");
15.
map.put("c", "d"); %>
16.
<%-- insert code here --%>
Which three EL expressions, inserted at line 16, are valid and evaluate to "d"? (Choose three.)

A) ${map["c"]}
B) ${map.(map.b)}
C) ${map.map.b}
D) ${map.c}
E) ${map[c]}
F) ${map[map.b]}

3. Click the Exhibit button.
Assume the product attribute does NOT yet exist in any scope.
Which two create an instance of com.example.Product and initialize the name and price
properties to the name and price request parameters? (Choose two.)

A) <jsp:useBean id="product" class="com.example.Product" />
<jsp:setProperty name="product" property="*" />
B) <jsp:useBean id="product" class="com.example.Product" />
<jsp:setProperty name="product" property="name"
value="${param.name}" />
<jsp:setProperty name="product" property="price"
value="${param.price}" />
C) <jsp:useBean id="product" class="com.example.Product" />
<% product.setName( request.getParameter( "name" ) ); %>
<% product.setPrice( request.getParameter( "price" ) ); %>
D) <jsp:useBean id="product" class="com.example.Product">
<jsp:setProperty name="product" property="name"
value="${name}" />
<jsp:setProperty name="product" property="price"
value="${price}" />
</jsp:useBean>

4. You have created a JSP that includes instance variables and a great deal of scriptlet code. Unfortunately, after extensive load testing, you have discovered several race conditions in your JSP scriptlet code. To fix these problems would require significant recoding, but you are already behind schedule. Which JSP code snippet can you use to resolve these concurrency problems?

A) <%@ page isThreadSafe='false' %>
B) <%! implements SingleThreadModel %>
C) <%@ page implements='SingleThreadModel' %>
D) <%@ implements SingleThreadModel %>
E) <%@ page useSingleThreadModel='true' %>

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

Solutions: