Oracle Oracle Certifications 1Z0-858 Questions & Answers

• Question 191:

  hich two are true regarding a web application class loader? (Choose two.)

  A. A web application may override the web container's implementation classes.

  B. A web application running in a J2EE product may override classes in the javax.* namespace.

  C. A web application class loader may NOT override any classes in the java.* and javax.* namespaces.

  D. Resources in the WAR class directory or in any of the JAR files within the library directory may be accessed using the J2SE semantics of getResource.

  E. Resources in the WAR class directory or in any of the JAR files within the library directory CANNOT be accessed using the J2SE semantics of getResource.

  Correct Answer: CD

• Question 192:

  You want to create a valid directory structure for your Java EE web application, and your application uses tag files and a JAR file. Which three must be located directly in your WEB-INF directory (NOT in a subdirectory of WEB-INF)? (Choose three.)

  A. The JAR file

  B. A directory called lib

  C. A directory called tags

  D. A directory called TLDs

  E. A directory called classes

  F. A directory called META-INF

  Correct Answer: BCE

• Question 193:

  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:

  302 /html/error.html

  Which, inserted at line 15, causes the container to redirect control to the error.html resource?

  A. response.setError(302);

  B. response.sendError(302);

  C. response.setStatus(302);

  D. response.sendRedirect(302);

  E. response.sendErrorRedirect(302);

  Correct Answer: B

• Question 194:

  Click the Exhibit button.

  As a maintenance feature, you have created this servlet to allow you to upload and remove files on your web server. Unfortunately, while testing this servlet, you try to upload a file using an HTTP request and on this servlet, the web container

  returns a 404 status.

  What is wrong with this servlet?

  

  A. HTTP does NOT support file upload operations.

  B. The servlet constructor must NOT have any parameters.

  C. The servlet needs a service method to dispatch the requests to the helper methods.

  D. The doPut and doDelete methods do NOT map to the proper HTTP methods.

  Correct Answer: B

• Question 195:

  You have built a web application with tight security. Several directories of your webapp are used for internal purposes and you have overridden the default servlet to send an HTTP 403 status code for any request that maps to one of these directories. During testing, the Quality Assurance director decided that they did NOT like seeing the bare response page generated by Firefox and Internet Explorer. The director recommended that the webapp should return a more user-friendly web page that has the same look-and- feel as the webapp plus links to the webapp's search engine. You have created this JSP page in the / WEB-INF/jsps/error403.jsp file. You do NOT want to alter the complex logic of the default servlet. How can you declare that the web container must send this JSP page whenever a 403 status is generated?

  A. 403/WEB-INF/jsps/error403.jsp

  B. 403/WEB-INF/jsps/error403.jsp

  C. 403/WEB- INF/jsps/error403.jsp

  D. 403/WEB- INF/jsps/error403.jsp

  Correct Answer: C

• Question 196:

  Given:

  10.

  public void service(ServletRequest request,

  11.

  ServletResponse response) {

  12.

  ServletInputStream sis =

  13.

  // insert code here

  14.

  }

  Which retrieves the binary input stream on line 13?

  A. request.getWriter();

  B. request.getReader();

  C. request.getInputStream();

  D. request.getResourceAsStream();

  E. request.getResourceAsStream(ServletRequest.REQUEST);

  Correct Answer: C

• Question 197:

  Your web page includes a Java SE v1.5 applet with the following declaration:

  11.

  Which HTTP method is used to retrieve the applet code?

  A. GET

  B. PUT

  C. POST

  D. RETRIEVE

  Correct Answer: A

• Question 198:

  You are creating a servlet that generates stock market graphs. You want to provide the web browser with precise information about the amount of data being sent in the response stream. Which two HttpServletResponse methods will you use to provide this information? (Choose two.)

  A. response.setLength(numberOfBytes);

  B. response.setContentLength(numberOfBytes);

  C. response.setHeader("Length", numberOfBytes);

  D. response.setIntHeader("Length", numberOfBytes);

  E. response.setHeader("Content-Length", numberOfBytes);

  F. response.setIntHeader("Content-Length", numberOfBytes);

  Correct Answer: BF

• Question 199:

  You need to retrieve the username cookie from an HTTP request. If this cookie does NOT exist, then the c variable will be null. Which code snippet must be used to retrieve this cookie object?

  A. 10. Cookie c = request.getCookie("username");

  B. 10. Cookie c = null;11. for ( Iterator i = request.getCookies();12. i.hasNext(); ) {13. Cookie o = (Cookie)

  C. next();14. if ( o.getName().equals("username") ) {15. c = o;16. break;17. }18. }

  D. 10. Cookie c = null;11. for ( Enumeration e = request.getCookies();12. e.hasMoreElements(); ) {13.Cookie o = (Cookie) e.nextElement();14. if ( o.getName().equals("username") ) {15. c = o;16.break;17. }18. }

  E. 10. Cookie c = null;11. Cookie[] cookies = request.getCookies();12. for ( int i = 0; i < cookies.length; i++ ) {13. if ( cookies[i].getName().equals("username") ) {14. c = cookies[i];15. break;16. }17. }

  Correct Answer: D

• Question 200:

  Which JSP standard action can be used to import content from a resource called foo.jsp?

  A.

  B.

  C.

  D.

  E. foo.jsp

  F. foo.jsp

  Correct Answer: C