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: Nov 26, 2025

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Question 1

Given the code fragment:

Assume that:

The required database driver is configured in the classpath.

The appropriate database is accessible with the dbURL, userName, and passWord exists.

The Employee and Customer tables are available and each table has id column with a few records and

the SQL queries are valid.

What is the result of compiling and executing this code fragment?

A : The program prints employee IDs.

B : The program prints customer IDs.

C : The program prints Exception.

D : compilation fails on line 13.

Answer: C

Question 2

Given the code fragment:

You have been asked to define the ProductCode class. The definition of the ProductCode class must

allow c1 instantiation to succeed and cause a compilation error on c2 instantiation.

Which definition of ProductCode meets the requirement?

A :

B :

C :

D :

Answer: B

Question 3

Given code of Test.java file:

1. package com.udayan.ocp;

3. import java.util.Arrays;

4. import java.util.Comparator;

5. import java.util.List;

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?

A : {Yusuf, Pathan}{Tom, Hanks}{Tom, Riddle}

B : {Yusuf, Pathan}{Tom, Riddle}{Tom, Hanks}

C : {Tom, Riddle}{Tom, Hanks}{Yusuf, Pathan}

D : {Tom, Hanks}{Tom, Riddle}{Yusuf, Pathan}

Answer: A

Question 4

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 5

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

Page: 1 / 94

Total 469 Questions | Updated On: Nov 26, 2025

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