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: Jul 08, 2025

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Question 1

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 2

Given code of Test.java file:

1. package com.udayan.ocp;

3. public class Test {

4. private static String msg = "Hello";

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

A : Bye

B : Hello

C : AssertionError is thrown at runtime and program terminates abruptly

Answer: C

Question 3

Given the code fragment:

Stream<Path> files = Files.walk(Paths.get(System.getProperty(“user.home”)));

files.forEach (fName -> { //line n1

try {

Path aPath = fName.toAbsolutePath(); //line n2

System.out.println(fName + “:”

+ Files.readAttributes(aPath,

Basic.File.Attributes.class).creationTime

());

} catch (IOException ex) {

ex.printStackTrace();

});

What is the result?

A : All files and directories under the home directory are listed along with their attributes

B : A compilation error occurs at line n1.

C : The files in the home directory are listed along with their attributes

D : A compilation error occurs at line n2.

Answer: A

Question 4

Given code of Test.java file:

1. package com.udayan.ocp;

3. public class Test {

4. private static void m1() throws Exception {

5. throw new Exception();

6. }

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

9. try {

10. m1();

11. } finally {

12. System.out.println("A");

13. }

14. }

15. }

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

A : A is printed to the console and program ends normally

B : A is printed to the console, stack trace is printed and then program ends normally

C : A is printed to the console, stack trace is printed and then program ends abruptly

D : Compilation error

Answer: D

Question 5

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

1. package com.udayan.ocp;

3. class X {

4. class Y {

5. private void m() {

6. System.out.println("INNER");

7. }

8. }

10. public void invokeInner() {

11. Y obj = new Y(); //Line 9

12. obj.m(); //Line 10

13. }

14. }

15.

16. public class Test {

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

18. new X().invokeInner();

19. }

20. }

A : Compilation error at Line 9 as instance of outer class (X) is needed to create the instance of inner class (Y)

B : Compilation error at Line 10 as private method m() cannot be invoked outside the body of inner class (Y)

C : INNER

D : Exception is thrown at runtime

Answer: C

Page: 1 / 94

Total 469 Questions | Updated On: Jul 08, 2025

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