Java 8 MCQ Online Test – Part 1

This collection of Java Multiple Choice Questions and Answers (MCQs): Quizzes & Practice Tests with Answer focuses on “Java 8”.
 

1. Lambdas introduced in Java 8 allow us to process_____

A Data as code

B Code as data

C None of the above

D All the answers are true

(argument-list) -> {body}

2. The newly introduced “Streams API” is available in which java 8 package?

A java.io.streams

B java.io.stream

C java.util.streams

D java.util.stream

3. What class can be used instead of System.getCurrentTimeMillis() to get date and time in Java 8?

A Clock

B Timer

C Time

D Date

4. Lambda expressions in java 8 are based on _____

A Procedural programming

B Functional programming

C Data programming

D All the answers are true

5. How many methods exist in a functional interface in Java 8?

A 3

B 2

C 1

D 0

6. In Java 8 interfaces, methods can be ______

A default

B abstract

C Both A and B are true.

D None of the above

7. Which of the following is not introduced with Java 8?

A API Stream

B Spliterator

C Lambda Expression

D Serialization

8. What is the return type of the lambda expression?

A String

B Object

C Function

D void

9. What is the new method introduced in java 8 to iterate through a collection?

A List.for()

B StringList.forEach()

C foreach(String i : StringList)

D for(String i : StringList)

10. What are the two types of Streams proposed by Java 8?

A Random and synchronized

B Parallel and random

C Sequential and random

D Sequential and parallel

Stream<Integer> sequential = list.stream();
Stream<Integer> parallel = list.parallelStream();

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