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Java 8 Essentials Quiz

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Java 8 Essentials Quiz

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Test your Java 8 knowledge with quick questions.

Created by

Jeni Alex
Jeni Alex
India

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Java 8 Essentials Quiz
 

Java 8 Essentials QuizOnline version

Test your Java 8 knowledge with quick questions.

by Jeni Alex
1

Which feature introduced in Java 8 enables functional programming style?

2

Which functional interface represents a function that takes T and returns R?

3

Which syntax is used for method references in Java 8?

4

Which package was introduced in Java 8 for date/time APIs?

5

What is a key benefit of default methods in interfaces?

6

Which OOP concept lets a superclass reference refer to subclass objects?

7

Which principle hides internal state and requires access via methods?

8

Which collection allows dynamic size and ordered elements?

9

Which method must be overridden to define a thread's work?

10

What annotation marks a functional interface?

11

What syntax creates a lambda expression in Java?

12

Which collection preserves insertion order and allows duplicates?

13

Which term describes executing multiple threads at the same time?

14

Which access modifier makes a member visible only within its class?

15

Which method signature matches Runnable's single abstract method?

 
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