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 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

Question 2

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 3

Given code of Test.java file:

1. package com.udayan.ocp;

3. interface Printer1 {

4. default void print() {

5. System.out.println("Printer1");

6. }

7. }

9. class Printer2 {

10. public void print() {

11. System.out.println("Printer2");

12. }

13. }

14.

15. class Printer extends Printer2 implements Printer1 {

16.

17. }

18.

19. public class Test {

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

21. Printer printer = new Printer();

22. printer.print();

23. }

24. }

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

A : Printer1

B : Compilation error for Printer1

C : Compilation error for Printer

D : Printer2

E : Compilation error for Printer2

Answer: D

Question 4

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.

A : Arrays.stream(loc).filter(x -> x.getLanguage().contains("FR")).forEach(System.out::println);

B : Arrays.stream(loc).filter(x -> x.toString().contains("FR")).forEach(System.out::println);

C : Arrays.stream(loc).filter(x -> x.getLanguage().equals("fr")).forEach(System.out::println);

D : Arrays.stream(loc).filter(x -> x.toString().startsWith("fr")).forEach(System.out::println);

E : Arrays.stream(loc).filter(x -> x.startsWith("fr")).forEach(System.out::println);

Answer: C,D

Question 5

Given:

class FuelNotAvailException extends Exception { }

class Vehicle {

void ride() throws FuelNotAvailException { //line n1

System.out.println(“Happy Journey!”);

}

class SolarVehicle extends Vehicle {

public void ride () throws Exception { //line n2

super ride ();

}

and the code fragment:

public static void main (String[] args) throws FuelNotAvailException, Exception

{

Vehicle v = new SolarVehicle ();

v.ride();

}

Which modification enables the code fragment to print Happy Journey!?

A : Replace line n1 with public void ride() throws FuelNotAvailException {

B : Replace line n1 with protected void ride() throws Exception {

C : Replace line n2 with void ride() throws Exception {

D : Replace line n2 with private void ride() throws FuelNotAvailException {

Answer: B

Page: 1 / 94

Total 469 Questions | Updated On: Jan 06, 2026

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