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: Sep 24, 2026

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Question 1

Given:

What is the result?

A : Keys: 4 Values: 4 Map: 0

B : Keys: 4 Values: 4 Map: 4

C : The compilation fails.

D : Keys: 0 Values: 0 Map:

E : Keys: 0 Values: 0 Map: 0

Answer: B

Question 2

Which three initialization statements are correct? (Choose three.)

A : int x = 12_34;

B : short sh = (short)'A';

C : String contact# = ''(+2) (999) (232)'';

D : boolean true = (4 == 4);

E : float x = 1.99;

F : int[][] e = {{1,1},{2,2}};

G : byte b = 10;char c = b;

Answer: A,B

Question 3

Given:

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

Which two methods modify field values? (Choose two.)

A : setAllCounts

B : setACount

C : setGCount

D : setCCount

E : setTCount

Answer: A,C

Question 4

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 5

Given:

Which is true about line 1?

A : If the value is not present, a NoSuchElementException is thrown at run time.

B : It always executes the System.out::print statement.

C : If the value is not present, a NullPointerException is thrown at run time.

D : If the value is not present, nothing is done.

Answer: D

Page: 1 / 103

Total 515 Questions | Updated On: Sep 24, 2026

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