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Oracle 1Z0-858 Exam Overview:

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

1. Your IT department is building a lightweight Front Controller servlet that invokes an application logic object with the interface:
public interface ApplicationController {
public String invoke(HttpServletRequest request)
}
The return value of this method indicates a symbolic name of the next view. From this name, the Front Controller servlet looks up the JSP URL in a configuration table. This URL might be an absolute path or a path relative to the current request. Next, the Front Controller servlet must send the request to this JSP to generate the view. Assume that the servlet variable request is assigned the current HttpServletRequest object and the variable context is assigned the webapp's ServletContext.
Which code snippet of the Front Controller servlet accomplishes this goal?

A) RequestDispatcher view = context.getRequestDispatcher(viewURL); view.forward(request, response);
B) Dispatcher view = context.getDispatcher(viewURL); view.forwardRequest(request, response);
C) Dispatcher view = request.getDispatcher(viewURL); view.forwardRequest(request, response);
D) RequestDispatcher view = request.getRequestDispatcher(viewURL);
view.forward(request, response);

2. Which two statements are true about the security-related tags in a valid Java EE deployment descriptor? (Choose two.)

A) A given <web-resource-collection> tag can contain from zero to many <url-pattern> tags.
B) A <security-constraint> tag can have many <web-resource-collection> tags.
C) A given <auth-constraint> tag can apply to only one <web-resource-collection> tag.
D) Every <security-constraint> tag must have at least one <http-method> tag.
E) It is possible to construct a valid <security-constraint> tag such that, for a given resource, no user roles can access that resource.

3. Servlet A forwarded a request to servlet B using the forward method of RequestDispatcher. What attribute in B's request object contains the URI of the original request received by servlet A?

A) javax.servlet.request_dispatcher.request_uri
B) javax.servlet.forward.REQUEST_URI
C) javax.servlet.request_dispatcher.REQUEST_URI
D) javax.servlet.forward.request_uri
E) REQUEST_URI

4. As a convenience feature, your web pages include an Ajax request every five minutes to a special servlet that monitors the age of the user's session. The client-side JavaScript that handles the Ajax callback displays a message on the screen as the session ages. The Ajax call does NOT pass any cookies, but it passes the session ID in a request parameter called sessionID. In addition, assume that your webapp keeps a hashmap of session objects by the ID. Here is a partial implementation of this servlet:
10.
public class SessionAgeServlet extends HttpServlet {
11.
public void service(HttpServletRequest request, HttpServletResponse) throws IOException {
12.
String sessionID = request.getParameter("sessionID");
13.
HttpSession session = getSession(sessionID);
14.
long age = // your code here
15.
response.getWriter().print(age);
16.
} ... // more code here
47. }
Which code snippet on line 14, will determine the age of the session?

A) session.getMaxInactiveInterval();
B) session.getLastAccessed().getTime() - session.getCreationTime().getTime();
C) session.getLastAccessedTime() - session.getCreationTime();
D) session.getMaxInactiveInterval() - session.getCreationTime();
E) session.getLastAccessedTime().getTime() - session.getCreationTime().getTime();
F) session.getLastAccessed() - session.getCreationTime();

5. Given an EL function declared with:
11.
<function>
12.
<name>spin</name>
13.
<function-class>com.example.Spinner</function-class>
14.
<function-signature>
15.
java.lang.String spinIt()
16.
</function-signature>
17.
</function>
Which two are true? (Choose two.)

A) The function method must have the signature public static String spin().
B) The method must be mapped to the logical name "spin" in the web.xml file.
C) The function class must be named Spinner, and must be in the package com.example.
D) The function method must have the signature: public static String spinIt().
E) The function method must have the signature: public String spinIt().
F) The function method must have the signature: public String spin().

Solutions: