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?

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. }

Which of the following code will create/return a Locale object for the JVM, on which your code is running?

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?

Given code of Test.java file: 

1. package com.udayan.ocp;

2.  

3. import java.util.Arrays;

4. import java.util.Comparator;

5. import java.util.List;

6.  

7. class Person {

8.     private String firstName;

9.     private String lastName;

10.  

11.     public Person(String firstName, String lastName) {

12.         this.firstName = firstName;

13.         this.lastName = lastName;

14.     }

15.  

16.     public String getFirstName() {

17.         return firstName;

18.     }

19.  

20.     public String getLastName() {

21.         return lastName;

22.     }

23.  

24.     public String toString() {

25.         return "{" + firstName + ", " + lastName + "}";

26.     }

27. }

28.  

29. public class Test {

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

31.         List list = Arrays.asList(

32.                 new Person("Tom", "Riddle"),

33.                 new Person("Tom", "Hanks"),

34.                 new Person("Yusuf", "Pathan"));

35.         list.stream().sorted(Comparator.comparing(Person::getFirstName).reversed()

36.                 .thenComparing(Person::getLastName)).forEach(System.out::println);

37.     }

38. }

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