EXPERTY DESIGNED 1Z0-809 PRACTICE TEST

Oracle 1Z0-809 Exam Questions
Total Questions: 469
Java SE 8 Programmer II
Updated On: Nov 10, 2025
Page : 1-47
Question 1

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?

Options :
Answer: A

Question 2

Given:
public class Counter {
 public static void main (String[ ] args) {
 int a = 10;
 int b = -1;
 assert (b >=1) : “Invalid Denominator”;
 int с = a / b;
 System.out.println (c);
 }
}
What is the result of running the code with the –da option?

Options :
Answer: A

Question 3

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


Options :
Answer: B

Question 4

Given the code fragment:

Untitled1-page69-image50
You have been asked to define the ProductCode class. The definition of the ProductCode class must
allow c1 instantiation to succeed and cause a compilation error on c2 instantiation.
Which definition of ProductCode meets the requirement?

Options :
Answer: B

Question 5

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?

Options :
Answer: B

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