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

Given the code fragment:
Untitled1-page69-image35
What is the result?


Answer: A
Question 2

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?


Answer: A
Question 3

Given code of Test.java file: 

1. package com.udayan.ocp;

2.  

3. public class Test {

4.     private static String msg = "Hello";

5.  

6.     private static String changeMsg(String m) {

7.         msg = m;

8.         return null;

9.     }

10.  

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

12.         if(args.length == 0) {

13.             assert false : changeMsg("Bye");

14.         }

15.         System.out.println(msg);

16.     }

17. }

What will be the result of executing Test class with below command? 

java -ea com.udayan.ocp.Test


Answer: C
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

Assume that proper import statements are available, and 'fr' is the language code for French language. 

And you have the following code snippet:

Locale [] loc = Locale.getAvailableLocales(); 

Which of the following statements will print all the supported (by the JVM) French Language Locale on to the console?

Select 2 options.


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