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: Jun 26, 2025

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Question 1

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 2

Given:

Which two independent changes will make the Main class compile? (Choose two.)

A : Move the entire Student class declaration to a separate Java file, Student.java.

B : Change line 2 to public Student(String classname).

C : Change line 1 to public class Student {.

D : Change line 3 to Student student = new Student(''Biology'');.

E : Change line 1 to static class Student {.

Answer: B,D

Question 3

Which two expressions create a valid Java Path instance? (Choose two.)

A : Paths.get("foo")

B : Paths.getPath("too")

C : Path.get(new URI("file:///domains/oracle/test.txt"))

D : new Path("foo")

E : Paths.get(URL.create("file:///domains/oracle/test.txt"))

Answer: A,E

Question 4

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 5

Given:

and:

Which code, when inserted on line 10, prints the number of unique localities from the roster list?

A : .map(Employee::getLocality).distinct().count();

B : map(e > e.getLocality()).count();

C : .map(e > e.getLocality()).collect(Collectors.toSet()).count();

D : .filter(Employee::getLocality).distinct().count();

Answer: D

Page: 1 / 103

Total 515 Questions | Updated On: Jun 26, 2025

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