Free Oracle 1Z0-819 Exam Questions

Become Oracle Certified with updated 1Z0-819 exam questions and correct answers

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Total 515 Questions | Updated On: Jul 09, 2025

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Question 1

Given:

What is the result?

A : The compilation fails.

B : 1.99,2.99,0

C : 1.99,2.99,0.0

D : 1.99,2.99 222

Answer: A

Question 2

Given:

This code results in a compilation error. Which code should be inserted on line 1 for a successful compilation?

A : Consumer consumer = msg -> { return System.out.print(msg); };

B : Consumer consumer = var arg #> {System.out.print(arg);};

C : Consumer consumer = (String args) #> System.out.print(args);

D : Consumer consumer = System.out::print;

Answer: D

Question 3

Given:

It is required that if p instanceof Pair then p.isValid() returns true. Which is the smallest set of visibility changes to insure this requirement is met?

A : setLeft and setRight must be protected.

B : left and right must be private.

C : isValid must be public.

D : left, right, setLeft, and setRight must be private.

Answer: B

Question 4

Given:

2021-04-27-22-23-17-3d4ddcb379cef75d65c8f83ed91c42db

What is the result?

A : null

B : nothing

C : It fails to compile.

D : java.lang.IllegalAccessException is thrown.

E : Student

Answer: C

Question 5

Given the code fragment:

What is the result?

A : ab cd ef

B : An ArrayIndexOutOfBoundsException is thrown at runtime.

C : The compilation fails.

D : abc def

E : ad be cf

Answer: A

Page: 1 / 103

Total 515 Questions | Updated On: Jul 09, 2025

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