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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

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What is the result?

Answer: A
Question 2

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


Answer: B
Question 3

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?

Answer: B
Question 4

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?

Answer: B
Question 5

Given code of Test.java file: 

1. package com.udayan.ocp;

2.  

3. import java.util.ArrayDeque;

4. import java.util.Deque;

5.  

6. public class Test {

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

8.         Deque deque = new ArrayDeque<>();

9.         deque.push(new Boolean("abc"));

10.         deque.push(new Boolean("tRuE"));

11.         deque.push(new Boolean("FALSE"));

12.         deque.push(true);

13.         System.out.println(deque.pop() + ":" + deque.peek() + ":" + deque.size());

14.     }

15. }

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

Answer: A
Page:    1 / 94      
Total 469 Questions | Updated On: Jan 06, 2026
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