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Oracle 1Z0-858 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Web Application Security | - Declarative security - Authentication and authorization |
| Web Application Design and Architecture | - Model-View-Controller (MVC) pattern - Deployment descriptors (web.xml) |
| JavaServer Pages (JSP) | - JSP syntax and lifecycle - Custom tags and JSTL - Expression Language (EL) |
| Servlet Technology | - Servlet lifecycle and architecture - Filters and listeners - Request and response handling - Session management |
| Web Application Deployment | - Packaging and deployment of WAR files - Application server configuration |
Oracle Java Enterprise Edition 5 Web Component Developer Certified Professional Sample Questions:
Assume that a news tag library contains the tags lookup and item:
lookup Retrieves the latest news headlines and executes the tag body once for each headline. Exposes a NESTED page-scoped attribute called headline of type com.example.Headline containing details for that headline.
item Outputs the HTML for a single news headline. Accepts an attribute info of type com.example.Headline containing details for the headline to be rendered.Which snippet of JSP code returns the latest news headlines in an HTML table, one per row?
- A. <table>
<tr>
<td>
<news:lookup />
<news:item info="${headline}" />
</td>
</tr>
</table> - B. <table>
<news:lookup>
<tr>
<td><news:item info="${headline}" /></td>
</tr>
</news:lookup>
</table> - C. <news:lookup />
<table>
<tr>
<td><news:item info="${headline}" /></td>
</tr>
</table> - D. <table>
<tr>
<news:lookup>
<td><news:item info="${headline}" /></td>
</news:lookup>
</tr>
</table>
Correct Answer: B 🗳️
Given:
11.
public class MyServlet extends HttpServlet {
12.
public void service(HttpServletRequest request,
13.
HttpServletResponse response)
14.
throws ServletException, IOException {
15.
// insert code here
16.
}
17.
}
and this element in the web application's deployment descriptor:
<error-page> <error-code>302</error-code> <location>/html/error.html</location> </error-page>
Which, inserted at line 15, causes the container to redirect control to the error.html resource?
- A. response.sendError(302);
- B. response.sendRedirect(302);
- C. response.sendErrorRedirect(302);
- D. response.setStatus(302);
- E. response.setError(302);
Correct Answer: A 🗳️
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 isThreadSafe='false' %>
- C. <%! implements SingleThreadModel %>
- D. <%@ page implements='SingleThreadModel' %>
- E. <%@ page useSingleThreadModel='true' %>
Correct Answer: B 🗳️
Given the web application deployment descriptor elements:
11.
<filter>
12.
<filter-name>ParamAdder</filter-name>
13.
<filter-class>com.example.ParamAdder</filter-class>
14.
</filter> ...
24.
<filter-mapping>
25.
<filter-name>ParamAdder</filter-name>
26.
<servlet-name>MyServlet</servlet-name>
27.
<!-- insert element here -->
28.
</filter-mapping>
Which element, inserted at line 27, causes the ParamAdder filter to be applied when MyServlet is invoked by another servlet using the RequestDispatcher.include method?
- A. <filter-condition>INCLUDE</filter-condition>
- B. <include/>
- C. <dispatcher>INCLUDE</dispatcher>
- D. <dispatcher>include</dispatcher>
- E. <filter-condition>include</filter-condition>
Correct Answer: C 🗳️
A JSP page contains a taglib directive whose uri attribute has the value dbtags. Which XML element within the web application deployment descriptor defines the associated TLD?
- A. <taglib>
<taglib-uri>dbtags</taglib-uri>
<taglib-location>
/WEB-INF/tlds/dbtags.tld
</taglib-location>
</taglib> - B. <taglib>
<uri>dbtags</uri>
<location>/WEB-INF/tlds/dbtags.tld</location>
</taglib> - C. <tld>
<tld-uri>dbtags</tld-uri>
<tld-location>/WEB-INF/tlds/dbtags.tld</tld-location>
</tld> - D. <tld>
<uri>dbtags</uri>
<location>/WEB-INF/tlds/dbtags.tld</location>
</tld>
Correct Answer: A 🗳️
