Oracle 1Z0-808 Online Practice Questions and Exam Preparation

Oracle 1Z0-808 Online Questions & Answers

• Question 221:

  Given:

  

  What is the result?

  A. A B C D
  B. A C D
  C. A C D D
  D. A B C C
  E. A B D C
  C. A C D D

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  Explanation/Reference:

• Question 222:

  Given the content of three files:

  

  Which statement is true? Which statement is true?

  A. Only the A.Java file compiles successfully.
  B. Only the B.java file compiles successfully.
  C. Only the C.java file compiles successfully.
  D. The A.Java and B.java files compile successfully.
  E. The B.java and C.java files compile successfully.
  F. The A.Java and C.java files compile successfully.
  A. Only the A.Java file compiles successfully.

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  Explanation/Reference:

  In class B.Java doStuff() has access modifier with variable name which is not allowed. C.Java class name is different than file name. Only private classes can have different names than file names

• Question 223:

  Given:

  

  What is the result?

  A. 97 98 99 100 null null null
  B. 91 98 99 100 101 102 103
  C. Compilation rails.
  D. A NullPointerException is thrown at runtime.
  E. An ArraylndexOutOfBoundsException is thrown at runtime.
  E. An ArraylndexOutOfBoundsException is thrown at runtime.

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  Explanation/Reference:

• Question 224:

  Given the following four Java file definitions:

  // Foo.java

  package facades;

  public interface Foo { }

  // Boo.java

  package facades;

  public interface Boo extends Foo { }

  // Woofy.java

  package org.domain

  // line n1

  public class Woofy implements Boo, Foo { }

  // Test.java

  package.org;

  public class Test {

  public static void main(String[] args) {

  Foo obj=new Woofy();

  Which set modifications enable the code to compile and run?

  A. At line n1, Insert: import facades;At line n2, insert:import facades;import org.domain;
  B. At line n1, Insert: import facades.*;At line n2, insert:import facades;import org.*;
  C. At line n1, Insert: import facades.*;At line n2, insert:import facades.Boo;import org.*;
  D. At line n1, Insert: import facades.Foo, Boo;At line n2, insert:import org.domain.Woofy;
  E. At line n1, Insert: import facades.*;At line n2, insert:import facades;import org.domain.Woofy;
  E. At line n1, Insert: import facades.*;At line n2, insert:import facades;import org.domain.Woofy;

• Question 225:

  Given:

  

  Which option enables the code to compile?

  

  A. Option A
  B. Option B
  C. Option C
  D. Option D
  D. Option D

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  Explanation/Reference:

• Question 226:

  public class StringReplace {

  public static void main(String[] args) {

  String message = "Hi everyone!";

  System.out.println("message = " + message.replace("e", "X")); }

  }

  What is the result?

  A. message = Hi everyone!
  B. message = Hi XvXryonX!
  C. A compile time error is produced.
  D. A runtime error is produced.
  E. message =
  F. message = Hi Xveryone!
  B. message = Hi XvXryonX!

• Question 227:

  Given the code fragment:

  

  A. Super Sub Sub
  B. Contract Contract Super
  C. Compilation fails at line n1
  D. Compilation fails at line n2
  D. Compilation fails at line n2

• Question 228:

  Given:

  

  What is the result?

  A. 3 4 5 6
  B. 3 4 3 6
  C. 5 4 5 6
  D. 3 6 5 6
  D. 3 6 5 6

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  Explanation/Reference:

  

• Question 229:

  Which of the following will print current time?

  A. System.out.print(new LocalTime()-now0);
  B. System.out.print(new LocalTime());
  C. System.ouLprint(LocalTime.now());
  D. System.ouLprint(LocalTime.today());
  E. None of the above.
  C. System.ouLprint(LocalTime.now());

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  Explanation/Reference:

  The LocalTime is an interface, so we can't use new keyword with them. So options A and C are incorrect.

  To get current time we can call now method on LocalTime interface. So option C is correct. Option D is incorrect as there is no method called today as in LocalTime interface https://docs.oracle.com/javase/tutorial/datetime/iso/datetime.html

• Question 230:

  Consider

  Integer number = Integer.valueOff 808.1");

  Which is true about the above statement?

  A. The value of the variable number will be 808.1
  B. The value of the variable number will be 808
  C. The value of the variable number will be 0.
  D. A NumberFormatException will be throw.
  E. It will not compile.
  D. A NumberFormatException will be throw.

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  Explanation/Reference:

  The Integer class value of 0 returns an Integer from given string. But we need to pass string which has correct format for integer otherwise it will throw a NumberFormatException. In this case we have passed string which is not an integer value (since what we passed is fractional number), so option D is correct.