Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 231:

  Given the following class declarations:

  public abstract class Animal public interface Hunter public class Cat extends Animal implements Hunter public class Tiger extends Cat

  Which answer fails to compile?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: D

• Question 232:

  Given:

  

  Which code fragment, when inserted at line 7, enables the code print true?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: A

• Question 233:

  Given:

  public class Test {

  public static void main(String[] args) {

  int ax = 10, az = 30;

  int aw = 1, ay = 1;

  try {

  aw = ax % 2;

  ay = az / aw;

  } catch (ArithmeticException e1) {

  System.out.println("Invalid Divisor");

  } catch (Exception e2) {

  aw = 1;

  System.out.println("Divisor Changed");

  }

  ay = az /aw; // Line 14

  System.out.println("Succesful Division " + ay);

  }

  }

  What is the result?

  A. Invalid Divisor Divisor Changed Successful Division 30

  B. Invalid Divisor Successful Division 30

  C. Invalid Divisor Exception in thread "main" java.lang.ArithmeticException: / by zero at test.Teagle.main(Teagle.java:14)

  D. Invalid Divisor Exception in thread "main" java.lang.ArithmeticException: / by zero at test.Teagle.main(Teagle.java:14) Successful Division 1

  Correct Answer: C

• Question 234:

  Given the code fragment:

  float x = 22.00f % 3.00f; int y = 22 % 3;

  System.out.print(x + ", "+ y);

  What is the result?

  A. 1.0, 1

  B. 1.0f, 1

  C. 7.33, 7

  D. Compilation fails

  E. An exception is thrown at runtime

  Correct Answer: A

• Question 235:

  Given: What is the result?

  

  A. x: 1 y: 2

  B. 3 y: 4

  C. x: 0 y: 0

  D. 3 y: 4

  E. x: 1 y: 2

  F. 0 y: 0

  G. x: 0 y: 0

  H. 0 y: 0

  Correct Answer: C

• Question 236:

  Given:

  class Base {

  public static void main(String[] args) {

  System.out.println("Base " + args[2]);

  }

  }

  public class Sub extends Base{

  public static void main(String[] args) {

  System.out.println("Overriden " + args[1]);

  }

  }

  And the commands:

  javac Sub.java

  java Sub 10 20 30

  What is the result?

  A. Base 30

  B. Overridden 20

  C. Overridden 20 Base 30

  D. Base 30 Overridden 20

  Correct Answer: B

• Question 237:

  Which of the following can fill in the blank in this code to make it compile?

  

  A. abstract

  B. public

  C. default

  D. It will not compile with any as interfaces cannot have non abstract methods.

  E. It will compile without filling the blank.

  Correct Answer: C

  From Java SE 8, we can use static and/or default methods in interfaces, but they should be non abstract methods. SO in this case using default in blank is completely legal. Hence option C is correct. Option A is incorrect as given method is not abstract, so can't use abstract there. Options B and E are incorrect as we can't have non abstract method interface if they are not default or static. https;//docs.oraclexom/javase/tutorial/java/Iandl/defaultmethods.html

• Question 238:

  Given the code fragment:

  

  Which code fragment, when inserted at line n1, enables the App class to print Equal?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

• Question 239:

  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.

  Correct Answer: D

  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.

• Question 240:

  Given: What is the result?

  

  A. 100

  B. Compilation fails due to an error in line n1

  C. Compilation fails due to an error at line n2

  D. Compilation fails due to an error at line n3

  Correct Answer: C