Free Oracle 1Z0-809 Exam Questions

Become Oracle Certified with updated 1Z0-809 exam questions and correct answers

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Total 469 Questions | Updated On: Jan 15, 2026

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Question 1

Given the code fragment:

List<String> empDetails = Arrays.asList(“100, Robin, HR”,

“200, Mary, AdminServices”,

“101, Peter, HR”);

empDetails.stream()

.filter(s-> s.contains(“1”))

.sorted()

.forEach(System.out::println); //line n1

What is the result?

A : 100, Robin, HR 101, Peter, HR

B : A compilation error occurs at line n1.

C : 100, Robin, HR101, Peter, HR200, Mary, AdminServices

D : 100, Robin, HR200, Mary, AdminServices101, Peter, HR

Answer: A

Question 2

Given the code fragments:

and

What is the result?

A : null

B : A compilation error occurs.

C : DogCatMouse

D : [Dog, Cat, Mouse]

Answer: D

Question 3

Given the code fragment:

Stream<Path> files = Files.walk(Paths.get(System.getProperty(“user.home”)));

files.forEach (fName -> { //line n1

try {

Path aPath = fName.toAbsolutePath(); //line n2

System.out.println(fName + “:”

+ Files.readAttributes(aPath,

Basic.File.Attributes.class).creationTime

());

} catch (IOException ex) {

ex.printStackTrace();

});

What is the result?

A : All files and directories under the home directory are listed along with their attributes

B : A compilation error occurs at line n1.

C : The files in the home directory are listed along with their attributes

D : A compilation error occurs at line n2.

Answer: A

Question 4

Given code of Test.java file:

1. package com.udayan.ocp;

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?

A : AE

B : RE

C : Compilation error

D : Program ends abruptly

Answer: A

Question 5

Given the code fragments:

class MyThread implements Runnable {

private static AtomicInteger count = new AtomicInteger (0);

public void run () {

int x = count.incrementAndGet();

System.out.print (x+” “);

}

and

Thread thread1 = new Thread(new MyThread());

Thread thread2 = new Thread(new MyThread());

Thread thread3 = new Thread(new MyThread());

Thread [] ta = {thread1, thread2, thread3};

for (int x= 0; x < 3; x++) {

ta[x].start();

}

Which statement is true?

A : The program prints 1 2 3 and the order is unpredictable

B : The program prints 1 2 3.

C : The program prints 1 1 1

D : A compilation error occurs.

Answer: A

Page: 1 / 94

Total 469 Questions | Updated On: Jan 15, 2026

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