Oracle Oracle Certifications 1Z0-808 Questions & Answers

• Question 351:

  Given:

  

  Which two classes use the shape class correctly?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  F. Option F

  Correct Answer: BE

  Explanation: When an abstract class is subclassed, the subclass usually provides implementations for all of the abstract methods in its parent class (E). However, if it does not, then the subclass must also be declared abstract (B). Note: An abstract class is a class that is declared abstract--it may or may not include abstract methods. Abstract classes cannot be instantiated, but they can be subclassed.

• Question 352:

  Which two are Java Exception classes?

  A. SercurityException

  B. DuplicatePathException

  C. IllegalArgumentException

  D. TooManyArgumentsException

  Correct Answer: AC

• Question 353:

  Given:

  

  What is the result?

  A. A B C D

  B. A C D

  C. A B C

  D. A B D

  E. A B D C

  Correct Answer: C

• Question 354:

  Given the code fragment:

  

  Which two modifications should you make so that the code compiles successfully?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  E. Option E

  Correct Answer: AC

  Add throws clause in both printFileContent and main.

• Question 355:

  Given: What is the result?

  

  A. true:true

  B. true:false

  C. false:true

  D. false:false

  Correct Answer: C

• Question 356:

  Given:

  

  What is the result?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: B

• Question 357:

  Given:

  

  What is the result?

  

  A. Option A

  B. Option B

  C. Option C

  D. Option D

  Correct Answer: C

• Question 358:

  Given:

  

  Which of the following is equivalent to the above code fragment?

  A. System.out.printLn(x>10?">,': "<":,'=");

  B. System.out.println(x>10? ">"?"<":"=");

  C. System.out.println(x>10?">":x<10?"<":"=");

  D. System.out.printLn(x>10?">"?,'<"?"=");

  E. None of the above

  Correct Answer: B

  Option A is incorrect as we can't use abstract with non abstract method, (here method has method body.)

  Option C is incorrect as when overriding method we can't use more restrictive access modifier, so trying to

  use private to override default access Level method causes a compile time error.

  Option D is incorrect as default methods (not methods with default access level) are allowed only in

  interfaces.

  Option E is incorrect as method all ready has void as return type, so we can't add int there. Option B is

  correct as we can use final there, since the method is non abstract https://docs.oracle.com/javase/tutorial/

  java/landl/polymorphism.html

• Question 359:

  Given:

  public class Test {

  public static void main(String[] args) {

  try {

  String[] arr =new String[4];

  arr[1] = "Unix";

  arr[2] = "Linux";

  arr[3] = "Solarios";

  for (String var : arr) {

  System.out.print(var + " ");

  }

  } catch(Exception e) {

  System.out.print (e.getClass());

  }

  }

  }

  What is the result?

  A. Unix Linux Solaris

  B. Null Unix Linux Solaris

  C. Class java.lang.Exception

  D. Class java.lang.NullPointerException

  Correct Answer: B

  Explanation: null Unix Linux Solarios

  The first element, arr[0], has not been defined.

• Question 360:

  Given:

  Given:

  public class SuperTest {

  public static void main(String[] args) {

  statement1

  statement2

  statement3

  }

  }

  class Shape {

  public Shape() {

  System.out.println("Shape: constructor");

  }

  public void foo() {

  System.out.println("Shape: foo");

  }

  } class Square extends Shape { public Square() { super(); } public Square(String label) { System.out.println("Square: constructor"); } public void foo() { super.foo(); } public void foo(String label) { System.out.println("Square: foo"); } } } } What should statement1, statement2, and statement3, be respectively, in order to produce the result? Shape: constructor Square: foo Shape: foo

  A. Square square = new Square ("bar"); square.foo ("bar"); square.foo();

  B. Square square = new Square ("bar"); square.foo ("bar"); square.foo ("bar");

  C. Square square = new Square (); square.foo (); square.foo(bar);

  D. Square square = new Square (); square.foo (); square.foo("bar");

  E. Square square = new Square (); square.foo (); square.foo ();

  F. Square square = new Square(); square.foo("bar"); square.foo();

  Correct Answer: F