Question No. 1

Given:

What is the result?

A42

BThe compilation fails due to an error in line 4.

C17

DThe compilation fails due to an error in line 3.

EThe compilation fails due to an error in line 2.

FThe compilation fails due to an error in line 1.

GThe compilation fails due to an error in line 5.

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Correct Answer: A

Question No. 2

Which code is correct?

ARunnable r = ''Message'' > System.out.println();

BRunnable r = () > System.out::print;

CRunnable r = () -> {System.out.println(''Message'');};

DRunnable r = > System.out.println(''Message'');

ERunnable r = {System.out.println(''Message'')};

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Correct Answer: C

Question No. 3

Given:

What is the output?

A300

BException

C200

D100

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Correct Answer: A

Question No. 4

Given:

What is required to make the Foo class thread safe?

ANo change is required.

BMake the declaration of lock static.

CReplace the lock constructor call with new ReentrantLock (true).

DMove the declaration of lock inside the foo method.

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Correct Answer: C

Question No. 5

Which command line runs the main class com.acme.Main from the module com.example?

Ajava --module-path mods com.example/com.acme.Main

Bjava --classpath com.example.jar com.acme.Main

Cjava --module-path mods -m com.example/com.acme.Main

Djava -classpath com.example.jar --m com.example/com.acme.Main

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Correct Answer: D

Free Oracle 1Z0-819 Exam Actual Questions