Free Oracle 1Z0-808 Exam Questions

Given the code fragment:

Given code of Test.java file:

1. package com.sampleproject.oca;

2.  

3. interface Blogger {

4.     default void blog() throws Exception {

5.         System.out.println("GENERIC");

6.     }

7. }

8.  

9. class TravelBlogger implements Blogger {

10.     public void blog() {

11.         System.out.println("TRAVEL");

12.     }

13. }

14.  

15. public class Test {

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

17.         Blogger blogger = new TravelBlogger(); //Line n1

18.         ((TravelBlogger)blogger).blog(); //Line n2

19.     }

20. }

What will be the result of compiling and executing Test class?

What will be the result of compiling and executing Test class?

1. //Test.java

2. package com.udayan.oca;

3.  

4. class Point {

5.     static int x;

6.     private int y;

7.     

8.     public String toString() {

9.         return "Point(" + x + ", " + y + ")";

10.     }

11. }

12.  

13. public class Test {

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

15.         Point p1 = new Point();

16.         p1.x = 100;

17.         p1.y = 200;

18.         

19.         Point p2 = new Point();

20.         p2.x = 100;

21.         p2.y = 200;

22.         

23.         System.out.println(p1);

24.     }

25. }

Consider below code of Test.java file:

1. package com.sampleproject.oca;

2.  

3. public class Test {

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

5.         String [][] arr = { {"%", "$$"}, {"***", "@@@@", "#####"}};

6.         for(String [] str : arr) {

7.             for(String s : str) {

8.                 System.out.println(s);

9.                 if(s.length() == 4) //Line n1

10.                     break; //Line n2

11.             }

12.             break; //Line n3

13.         }

14.     }

15. }

What will be the result of compiling and executing Test class?

How many String objects are there in the HEAP memory, when control is at Line 9?

1. package com.udayan.oca;

2.  

3. public class Test {

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

5.          String s1 = new String("Java"); //Line 3

6.          String s2 = "JaVa"; //Line 4

7.          String s3 = "JaVa"; //Line 5

8.          String s4 = "Java"; //Line 6

9.          String s5 = "Java"; //Line 7

10.  

11.          int i = 1; //Line 9

12.  

13.      }

14. }