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Oracle 1Z0-858 Exam Syllabus Topics:

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

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

2. Which two directives are applicable only to tag files? (Choose two.)

A) variable
B) page
C) include
D) tag
E) taglib

3. 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, because the business and resource tiers are distributed, the application needs to minimize the inter-tier network traffic related to servicing client requests. Which design patterns, working together, address these issues?

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

4. Given:
1.package com.example;
2.3.
public abstract class AbstractItem {
4.private String name;
...
13. }
Assume a concrete class com.example.ConcreteItem extends com.example.AbstractItem. A servlet sets a session-scoped attribute called "item" that is an instance of com.example.ConcreteItem and then forwards to a JSP page.
Which two are valid standard action invocations that expose a scripting variable to the JSP page? (Choose two.)

A) <jsp:useBean id="item" class="com.example.ConcreteItem"
scope="session" />
B) <jsp:useBean id="item" type="com.example.ConcreteItem"
scope="session" />
C) <jsp:useBean id="item" type="com.example.ConcreteItem"
class="com.example.AbstractItem"
scope="session" />
D) <jsp:useBean id="com.example.ConcreteItem"
scope="session" />

5. Every page of your web site must include a common set of navigation menus at the top of the page. This menu is static HTML and changes frequently, so you have decided to use JSP's static import mechanism. Which JSP code snippet accomplishes this goal?

A) <%@ import file='/common/menu.html' %>
B) <%@ include file='/common/menu.html' %>
C) <%@ include page='/common/menu.html' %>
D) <%@ import page='/common/menu.html' %>
E) <%@ page include='/common/menu.html' %>
F) <%@ page import='/common/menu.html' %>

Solutions: