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

Consider the code of Test.java file:

1. package com.udayan.ocp;

3. class Player {

4. String name;

5. int age;

7. Player() {

8. this.name = "Yuvraj";

9. this.age = 36;

10. }

11.

12. public String toString() {

13. return name + ", " + age;

14. }

15.

16. public Class getClass() {

17. return super.getClass();

18. }

19. }

20.

21. public class Test {

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

23. System.out.println(new Player());

24. }

25. }

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

A : Compilation error

B : Yuvraj, 36

C : null, 0

D : Text containing @ symbol

Answer: A

Question 2

Given the code fragment:

public class FileThread implements Runnable {

String fName;

public FileThread(String fName) { this.fName = fName; }

public void run () System.out.println(fName);}

public static void main (String[] args) throws IOException,

InterruptedException {

ExecutorService executor = Executors.newCachedThreadPool();

Stream<Path> listOfFiles = Files.walk(Paths.get(“Java Projects”));

listOfFiles.forEach(line -> {

executor.execute(new FileThread(line.getFileName().toString()));

line n1

});

executor.shutdown();

executor.awaitTermination(5, TimeUnit.DAYS); //

line n2

}

The Java Projects directory exists and contains a list of files.

What is the result?

A : The program throws a runtime exception at line n2.

B : The program prints files names concurrently

C : The program prints files names sequentially.

D : A compilation error occurs at line n1

Answer: B

Question 3

Given:

and the code fragment:

What is the result?

A : A compilation error occurs at line n2.

B : A compilation error occurs because the try block doesn’t have a catch or finally block.

C : A compilation error occurs at line n1.

D : The program compiles successfully.

Answer: B

Question 4

F: is accessible for reading and below is the directory structure for F:

1. F:.

2. └───A

3. └───B

4. └───C

5. Book.java

'Book.java' file is available under 'C' directory.

Given code of Test.java file:

1. package com.udayan.ocp;

3. import java.nio.file.Path;

4. import java.nio.file.Paths;

6. public class Test {

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

8. Path file = Paths.get("F:\\A\\B\\Book.java");

9. System.out.println(file.toAbsolutePath());

10. }

11. }

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

A : F:\A\B\Book.java

B : FileNotFoundException is thrown at runtime.

C : NoSuchFileException is thrown at runtime.

D : Book.java

Answer: A

Question 5

Given code of Test.java file:

1. package com.udayan.ocp;

3. import java.util.stream.Stream;

5. public class Test {

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

7. Stream stream = Stream.of("d", "cc", "bbb", "aaaa");

8. stream.sorted().forEach(System.out::println);

9. }

10. }

Which of the following needs to be done, so that output is:

bbb

aaaa

A : No need to make any changes, on execution given code prints expected result

B : Replace stream.sorted() with stream.sorted((s1,s2) -> s1.length() - s2.length())

C : Replace stream.sorted() with stream.sorted((s1,s2) -> s2.length() - s1.length())

Answer: B

Page: 1 / 94

Total 469 Questions | Updated On: Jan 15, 2026

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