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 28, 2026

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Question 1

Consider the code of Greet.java file:

1. package com.udayan.ocp;

3. public final class Greet {

4. private String msg;

5. public Greet(String msg) {

6. this.msg = msg;

7. }

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?

A : Yes

B : No

Answer: B

Question 2

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 3

Given:

From what threading problem does the program suffer?

A : race condition

B : deadlock

C : starvation

D : livelock

Answer: B

Question 4

Given:

and the code fragment:

What is the result?

A : A compilation error occurs at line n2.

B : A compilation error occurs because the try block doesn’t have a catch or finally block.

C : A compilation error occurs at line n1.

D : The program compiles successfully.

Answer: B

Question 5

Given the code fragment:

Stream<Path> files = Files.list(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 and folders in the home directory are listed along with their attributes.

D : A compilation error occurs at line n2.

Answer: C

Page: 1 / 94

Total 469 Questions | Updated On: Jan 28, 2026

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