[Free] 2018(Jan) EnsurePass Testinsides Oracle 1z0-854 Dumps with VCE and PDF 61-70

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Java Standard Edition 5 Programmer Certified Professional Upgrade Exam

Question No: 61

Click the Exhibit button.

Given the fully-qualified class names:

com.foo.bar.Dog com.foo.bar.blatz.Book com.bar.Car com.bar.blatz.Sun

Which graph represents the correct directory structure for a JAR file from which those classes can be used by the compiler and JVM?

Ensurepass 2018 PDF and VCE

  1. Jar C

  2. Jar E

  3. Jar A

  4. Jar D

  5. Jar B

Answer: C

Question No: 62

A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0, object), but does NOT need to support quick random access. What supports these requirements?

  1. java.util.Queue

  2. java.util.ArrayList

  3. java.util.LinkedList

  4. java.util.LinearList

Answer: C

Question No: 63


  1. public static Iterator reverse(List list) {

  2. Collections.reverse(list);

  3. return list.iterator();

14. }

  1. public static void main(String[] args) {

  2. List list = new ArrayList();

  3. list.add(quot;1quot;); list.add(quot;2quot;); list.add(quot;3quot;);

  4. for (Object obj: reverse(list))

  5. System.out.print(obj quot;, quot;);

20. }

What is the result?

A. 1, 2, 3,

  1. The code runs with no output.

  2. Compilation fails.

  3. An exception is thrown at runtime.

E. 3, 2, 1,

Answer: C

Question No: 64

A programmer needs to create a logging method that can accept an arbitrary number of arguments. For example, it may be called in these ways:

logIt(quot;log message1quot;);

logIt(quot;log message2quot;,quot;log message3quot;);

logIt(quot;log message4quot;,quot;log message5quot;,quot;log message6quot;);

Which declaration satisfies this requirement?

  1. public void logIt(String… msgs)

  2. public void logIt(String * msgs)

  3. public void logIt(String [] msgs)

  4. public void logIt(String msg1, String msg2, String msg3)

Answer: A

Question No: 65


  1. abstract class Vehicle { public int speed() { return 0; }}

  2. class Car extends Vehicle { public int speed() { return 60; }}

  3. class RaceCar extends Car { public int speed() { return 150; }}

  1. RaceCar racer = new RaceCar();

  2. Car car = new RaceCar();

  3. Vehicle vehicle = new RaceCar();

  4. System.out.println(racer.speed() quot;, quot; car.speed()

25. quot;, quot; vehicle.speed()); What is the result?

A. 150, 150, 150

B. 150, 60, 0

C. An exception is thrown at runtime.

D. 0, 0, 0

E. Compilation fails.

Answer: A

Question No: 66


  1. abstract class A {

  2. abstract void a1();

  3. void a2() { }

13. }

  1. class B extends A {

  2. void a1() { }

  3. void a2() { }

17. }

18. class C extends B { void c1() { } } and:

A x = new B(); C y = new C(); A z = new C();

What are four valid examples of polymorphic method calls? (Choose four.)

A. x.a2();

B. x.a1();

C. z.a1();

D. z.a2();

E. z.c1();

F. y.c1();

Answer: A,B,C,D

Question No: 67


  1. public class Score implements Comparablelt;Scoregt; {

  2. private int wins, losses;

  3. public Score(int w, int l) { wins = w; losses = l; }

  4. public int getWins() { return wins; }

  5. public int getLosses() { return losses; }

  6. public String toString() {

  7. return quot;lt;quot; wins quot;,quot; losses quot;gt;quot;; 8. }

  1. // insert code here

    10. }

    Which method will complete this class?

    1. public int compareTo(Object o){/*more code here*/}

    2. public int compare(Score s1,Score s2){/*more code here*/}

    3. public int compareTo(Score other){/*more code here*/}

    4. public int compare(Object o1,Object o2){/*more code here*/}

      Answer: C

      Question No: 68

      A class games.cards.Poker is correctly defined in the jar file Poker.jar. A user wants to execute the main method of Poker on a UNIX system using the command:

      java games.cards.Poker

      What allows the user to do this?

      1. put Poker.jar in directory /stuff/java/games/cards, and set the CLASSPATH to include


      2. put Poker.jar in directory /stuff/java/games/cards, and set the CLASSPATH to include


      3. Put Poker.jar in directory /stuff/java, and set the CLASSPATH to include


      4. put Poker.jar in directory /stuff/java, and set the CLASSPATH to include /stuff/java

      5. put Poker.jar in directory /stuff/java/games/cards, and set the CLASSPATH to include


      6. put Poker.jar in directory /stuff/java, and set the CLASSPATH to include /stuff/java/*.jar

      Answer: C

      Question No: 69 DRAG DROP

      Click the Task button.

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      Question No: 70


  2. public class Foo {

  3. static int[] a;

12. static { a[0]=2; }

13. public static void main( String[] args ) {}

14. }

Which exception or error will be thrown when a programmer attempts to run this code?

  1. java.lang.IllegalStateException

  2. java.lang.ArrayIndexOutOfBoundsException

  3. java.lang.StackOverflowError

  4. java.lang.ExceptionInInitializerError

Answer: D

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