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: Aug 02, 2026

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Question 1

Given:

var fruits = List.of(''apple'', ''orange'', ''banana'', ''lemon'');

You want to examine the first element that contains the character n. Which statement will accomplish this?

A : String result = fruits.stream().filter(f > f.contains(''n'')).findAny();

B : fruits.stream().filter(f > f.contains(''n'')).forEachOrdered(System.out::print);

C : Optional result = fruits.stream().filter(f > f.contains (''n'')).findFirst ();

D : Optional result = fruits.stream().anyMatch(f > f.contains(''n''));

Answer: B

Question 2

Given:

You want to calculate the average of the Player’s score.

Which statement inserted on line 1 will accomplish this?

A : players.stream().average().orElse(0.0);

B : players.stream().mapToInt(a -> a.score).average().orElse(0.0);

C : players.stream().mapToDouble(a -> a.score).average();

D : players.stream().map(a -> a.score).average();

Answer: B

Question 3

Examine these module declarations:

Which two statements are correct? (Choose two.)

A : The ServiceProvider module is the only module that, at run time, can provide the com.example.api API.

B : The placement of the com.example.api API in a separate module, ServiceAPI, makes it easy to install multiple provider modules.

C : The Consumer module should require the ServiceProvider module.

D : The ServiceProvider module should export the com.myimpl package.

E : The ServiceProvider module does not know the identity of a module (such as Consumer) that uses the com.example.api API.

Answer: A,C

Question 4

Given the code fragment:

What is the result?

A : 0

B : The program prints nothing.

C : It prints 1 in infinite loop.

D : 1

E : 0

F : 1

Answer: B

Question 5

Which is the correct order of possible statements in the structure of a Java class file?

A : class, package, import

B : package, import, class

C : import, package, class

D : package, class, import

E : import, class, package

Answer: B

Page: 1 / 103

Total 515 Questions | Updated On: Aug 02, 2026

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