Free Oracle 1Z0-809 Exam Questions

Given code of Test.java file: 

1. package com.udayan.ocp;

2.  

3. public class Test {

4.     private static void div(int i, int j) {

5.         try {

6.             System.out.println(i / j);

7.         } catch(ArithmeticException e) {

8.             throw (RuntimeException)e;

9.         }

10.     }

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

12.         try {

13.             div(5, 0);

14.         } catch(ArithmeticException e) {

15.             System.out.println("AE");

16.         } catch(RuntimeException e) {

17.             System.out.println("RE");

18.         }

19.     }

20. }

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

Given code of Test.java file: 

1. package com.udayan.ocp;

2.  

3. import java.util.Arrays;

4. import java.util.List;

5. import java.util.function.Predicate;

6.  

7. public class Test {

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

9.         List list = Arrays.asList(-80, 100, -40, 25, 200);

10.         Predicate predicate = num -> {

11.             int ctr = 1;

12.             boolean result = num > 0;

13.             System.out.print(ctr++ + ".");

14.             return result;

15.         };

16.         

17.         list.stream().filter(predicate).findFirst();

18.     }

19. }

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

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

1. package com.udayan.ocp;

2.  

3. class M {

4.     private int num1 = 100;

5.     class N {

6.         private int num2 = 200;

7.     }

8.     

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

10.         M outer = new M();

11.         M.N inner = outer.new N();

12.         System.out.println(outer.num1 + inner.num2);

13.     }

14. }

Given code of Test.java file: 

1. package com.udayan.ocp;

2.  

3. import java.util.stream.Stream;

4.  

5. public class Test {

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

7.         System.out.println(Stream.of(10, 0, -10).sorted().findAny().orElse(-1));

8.     }

9. }

Which of the following statements are true about the execution of Test class?

Select 2 options.

Consider the code of Greet.java file:

1. package com.udayan.ocp;

2.  

3. public final class Greet {

4.     private String msg;

5.     public Greet(String msg) {

6.         this.msg = msg;

7.     }

8.  

9.     public String getMsg() {

10.         return msg;

11.     }

12.  

13.     public void setMsg(String msg) {

14.         this.msg = msg;

15.     }

16. }

Is Greet class an immutable class?