100% Free 1Z0-819 Practice Exam Questions and Answers

Stay Ahead with Latest 1Z0-819 Oracle Java Practice Test Questions 2026

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Total 515 Questions | Updated On: Sep 17, 2026

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Question 1

Given:

What is the result?

A : is it 1

B : An IndexOutOfBoundsException is thrown at runtime.

C : is it 0

D : this is it 2

E : this is it 3 222

Answer: D

Question 2

Given:

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

Which statement on line 1 enables this code fragment to compile?

A : Function function = String::toUpperCase;

B : UnaryOperator function = s > s.toUpperCase();

C : UnaryOperator function = String::toUpperCase;

D : Function function = m > m.toUpperCase();

Answer: C

Question 3

Given the code fragment:

What change on line 1 will make this code compile?

A : Add catch (L |N e).

B : Add catch (L |M N e).

C : Add catch (L e).

D : Add catch (N | L | M e).

E : Add catch (M |L e).

Answer: C

Question 4

You replace the code on line 1 to use ParallelStream.

Which one is correct?

A : The code will produce the same result.

B : The compilation fails.

C : A NoSuchElementException is thrown at run time.

D : The code may produce a different result.

Answer: D

Question 5

Which three guidelines are used to protect confidential information? (Choose three.)

A : Limit access to objects holding confidential information.

B : Clearly identify and label confidential information.

C : Manage confidential and other information uniformly.

D : Transparently handle information to improve diagnostics.

E : Treat user input as normal information.

F : Validate input before storing confidential information.

G : Encapsulate confidential information.

Answer: A,D

Page: 1 / 103

Total 515 Questions | Updated On: Sep 17, 2026

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