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 15, 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:

Which annotation should be used to remove warnings from compilation?

A : @SuppressWarnings on the main and print methods

B : @SuppressWarnings(''unchecked'') on main and @SafeVarargs on the print method

C : @SuppressWarnings(''rawtypes'') on main and @SafeVarargs on the print method

D : @SuppressWarnings(''all'') on the main and print methods

Answer: B

Question 3

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 4

Which is a proper JDBC URL?

A : jdbe.mysql.com://localhost:3306/database

B : http://localhost.mysql.com:3306/database

C : http://localhostmysql.jdbc:3306/database

D : jdbc:mysql://localhost:3306/database

Answer: D

Question 5

Given:

What is the expected result of javac?

A : javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: package java does not exist

B : javac compiles Mycar.java without errors or warnings.

C : javac fails to compile the class and prints the error message, C:\workspace4\Mycar.java:1:error: expected import java.lang

D : javac fails to compile the class and prints the error message, Error: Could not find or load main class Mycar.class

Answer: B

Page: 1 / 103

Total 515 Questions | Updated On: Sep 15, 2026

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