Oracle 1Z0-858

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

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

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

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

3. The tl:taskList and tl:task tags output a set of tasks to the response and are used as follows:
11.
<tl:taskList>
12.
<tl:task name="Mow the lawn" />
13.
<tl:task name="Feed the dog" />
14.
<tl:task name="Do the laundry" />
15.
</tl:taskList>
The tl:task tag supplies information about a single task while the tl:taskList tag does the final output. The tag handler for tl:taskList is TaskListTag. The tag handler for tl:task is TaskTag. Both tag handlers extend BodyTagSupport.
Which allows the tl:taskList tag to get the task names from its nested tl:task children?

A) In the TaskListTag.doStartTag method, call super.getChildTags() and iterate through the results. Cast each result to a TaskTag and call getName().
B) Create an addTaskName method in TaskListTag. Have the TaskListTag.doStartTag method, return BodyTag.EVAL_BODY_BUFFERE In the TaskTag.doStartTag method, call super.getParent(), cast it to a TaskListTag, and call addTaskName().
C) It is impossible for a tag handler that extends BodyTagSupport to communicate with its parent and child tags.
D) In the TaskListTag.doStartTag method, call getChildTags() on the PageContext and iterate through the results. Cast each result to a TaskTag and call getName().
E) Create an addTaskName method in TaskListTag. Have the TaskListTag.doStartTag method, return BodyTag.EVAL_BODY_BUFFERED. In the TaskTag.doStartTag method, call findAncestorWithClass() on the PageContext, passing TaskListTag as the class to find. Cast the result to TaskListTag and call addTaskName().

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

5. Assume the scoped attribute priority does NOT yet exist. Which two create and set a new request-scoped attribute priority to the value "medium"? (Choose two.)

A) <c:set property="priority" scope="request">medium</c:set>
B) <c:set var="priority" value="medium" />
C) <c:set property="priority" value="medium" scope="request" />
D) ${priority = 'medium'}
E) <c:set var="priority" scope="request">medium</c:set>
F) ${requestScope['priority'] = 'medium'}
G) <c:set var="priority" value="medium" scope="request" />

Solutions: