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 06, 2026

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Question 1

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

1. package com.udayan.ocp;

3. class M {

4. private int num1 = 100;

5. class N {

6. private int num2 = 200;

7. }

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. }

A : 300

B : 200

C : Compilation error

D : 100

Answer: A

Question 2

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. 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.

A : It will never print -1 on to the console.

B : It can print any number from the stream.

C : It will always print -10 on to the console.

D : It will always print 0 on to the console.

E : It will always print 10 on to the console.

Answer: A,B

Question 3

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

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

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

A : System.getDefault();

B : Locale.getDefault();

C : Locale.getLocale();

D : Locale.getDefaultLocale();

Answer: B

Page: 1 / 94

Total 469 Questions | Updated On: Jan 06, 2026

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