Oracle Oracle Certifications 1Z0-858 Questions & Answers

• Question 151:

  The Squeaky Bean company has decided to port their web application to a new J2EE 1.4 container. While reviewing the application, a developer realizes that in multiple places within the current application, nearly duplicate code exists that finds enterprise beans. Which pattern should be used to eliminate this duplicate code?

  A. Transfer Object

  B. Front Controller

  C. Service Locator

  D. Intercepting Filter

  E. Business Delegate

  F. Model-View-Controller

  Correct Answer: C

• Question 152:

  Given this fragment in a servlet:

  23.

  if(req.isUserInRole("Admin")) {

  24.

  // do stuff

  25.

  }

  And the following fragment from the related Java EE deployment descriptor:

  812.

  813.

  Admin

  814.

  Administrator

  815.

  900.

  901.

  Admin

  902.

  Administrator

  903.

  What is the result?

  A. Line 24 can never be reached.

  B. The deployment descriptor is NOT valid.

  C. If line 24 executes, the user's role will be Admin.

  D. If line 24 executes, the user's role will be Administrator.

  E. If line 24 executes the user's role will NOT be predictable.

  Correct Answer: D

• Question 153:

  Which two are true about authentication? (Choose two.)

  A. Form-based logins should NOT be used with HTTPS.

  B. When using Basic Authentication the target server is NOT authenticated.

  C. J2EE compliant web containers are NOT required to support the HTTPS protocol.

  D. Web containers are required to support unauthenticated access to unprotected web resources.

  E. Form-based logins should NOT be used when sessions are maintained by cookies or SSL session information.

  Correct Answer: BD

• Question 154:

  Given:

  11.

  <%

  12.

  request.setAttribute("vals", new String[]{"1","2","3","4"});

  13.

  request.setAttribute("index", "2");

  14.

  %>

  15.

  <%-- insert code here --%>

  Which three EL expressions, inserted at line 15, are valid and evaluate to "3"? (Choose three.)

  A. ${vals.2}

  B. ${vals["2"]}

  C. ${vals.index}

  D. ${vals[index]}

  E. ${vals}[index]

  F. ${vals.(vals.index)}

  G. ${vals[vals[index-1]]}

  Correct Answer: BDG

• Question 155:

  Given:

  11.

  <% java.util.Map map = new java.util.HashMap();

  12.

  request.setAttribute("map", map);

  13.

  map.put("a", "true");

  14.

  map.put("b", "false");

  15.

  map.put("c", "42"); %>

  Which three EL expressions are valid and evaluate to true? (Choose three.)

  A. ${not map.c}

  B. ${map.d or map.a}

  C. ${map.a and map.d}

  D. ${map.false or map.true}

  E. ${map.a and map.b or map.a}

  F. ${map['true'] or map['false']}

  Correct Answer: ABE

• Question 156:

  Given:

  http://com.example/myServlet.jsp?num=oneandnum=twoandnum=three

  Which two produce the output "one, two and three"? (Choose two.)

  A. ${param.num[0],[1] and [2]}

  B. ${paramValues[0],[1] and [2]}

  C. ${param.num[0]}, ${param.num[1]} and ${param.num[2]}

  D. ${paramValues.num[0]}, ${paramValues.num[1]} and ${paramValues.num[2]}

  E. ${paramValues["num"][0]}, ${paramValues["num"][1]} and ${paramValues["num"][2]}

  F. ${parameterValues.num[0]}, ${parameterValues.num[1]} and ${parameterValues.num[2]}

  G. ${parameterValues["num"]["0"]}, ${parameterValues["num"]["1"]} and $ {parameterValues["num"]["2"]}

  Correct Answer: DE

• Question 157:

  Given a web application in which the cookie userName is expected to contain the name of the user. Which EL expression evaluates to that user name?

  A. ${userName}

  B. ${cookie.userName}

  C. ${cookie.user.name}

  D. ${cookies.userName[0]}

  E. ${cookies.userName}[1]

  F. ${cookies.get('userName')}

  Correct Answer: B

• Question 158:

  Given an EL function declared with:

  11.

  12.

  spin

  13.

  com.example.Spinner

  14.

  15.

  java.lang.String spinIt()

  16.

  17.

  Which two are true? (Choose two.)

  A. The function method must have the signature:public String spin().

  B. The method must be mapped to the logical name "spin" in the web.xml file.

  C. The function method must have the signature:public String spinIt().

  D. The function method must have the signaturepublic static String spin().

  E. The function method must have the signature:public static String spinIt().

  F. The function class must be named Spinner, and must be in the package com.example.

  Correct Answer: EF

• Question 159:

  Given a JSP page:

  11.

  12.

  13.

  14.

  15.

  16.

  17.

  The tag handler for n:recurse extends SimpleTagSupport.

  Assuming an n:recurse tag can either contain an empty body or another n:recurse tag, which strategy allows the tag handler for n:recurse to output the nesting depth of the deepest n:recurse tag?

  A. It is impossible to determine the deepest nesting depth because it is impossible for tag handlers that extend SimpleTagSupport to communicate with their parent and child tags.

  B. Create a private non-static attribute in the tag handler class called count of type int initialized to 0. Increment count in the doTag method. If the tag has a body, invoke the fragment for that body. Otherwise, output the value of count.

  C. Start a counter at 1. Call getChildTags(). If it returns null, output the value of the counter. Otherwise, increment counter and continue from where getChildTags() is called. Skip processing of the body.

  D. If the tag has a body, invoke the fragment for that body.Otherwise, start a counter at 1. Call getParent (). If it returns null, output the value of the counter Otherwise, increment the counter and continue from where getParent() is called.

  Correct Answer: D

• Question 160:

  Click the Exhibit button.

  The h:highlight tag renders its body, highlighting an arbitrary number of words, each of which is passed as an attribute (word1, word2, ...). For example, a JSP page can invoke the h:highlight tag as follows:

  11.

  12.

  high medium low

  13.

  Given that HighlightTag extends SimpleTagSupport, which three steps are necessary to implement the tag handler for the highlight tag? (Choose three).

  

  A. add a doTag method

  B. add a doStartTag method

  C. add a getter and setter for the color attribute

  D. create and implement a TagExtraInfo class

  E. implement the DynamicAttributes interface

  F. add a getter and setter for the word1 and word2 attributes

  Correct Answer: ACE