Free Oracle 1Z0-808 Exam Questions

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?

Given the code fragment:

What is the signature of special main method?

Given code of Test.java file:

1. package com.sampleproject.oca;

2.  

3. abstract class Animal {

4.     abstract void jump() throws RuntimeException;

5. }

6.  

7. class Deer extends Animal {

8.     void jump() { //Line n1

9.         System.out.println("DEER JUMPS");

10.     }

11.  

12.     void jump(int i) {

13.         System.out.println("DEER JUMPS TO " + i + " FEET");

14.     }

15. }

16.  

17. public class Test {

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

19.         Animal animal = new Deer();

20.         ((Deer)animal).jump(); //Line n2

21.         ((Deer)animal).jump(5); //Line n3

22.     }

23. }

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

Consider below codes of 3 java files:

1. //M.java

2. package com.sampleproject.oca;

3.  

4. public class M {

5.     public void printName() {

6.         System.out.println("M");

7.     }

8. }

1. //N.java

2. package com.sampleproject.oca;

3.  

4. public class N extends M {

5.     public void printName() {

6.         System.out.println("N");

7.     }

8. }

1. //Test.java

2. package com.sampleproject.oca.test;

3.  

4. import com.sampleproject.oca.*;

5.  

6. public class Test {

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

8.         M obj1 = new M();

9.         N obj2 = (N)obj1;

10.         obj2.printName();

11.     }

12. }

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