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Java 8 Objective Questions and Answers

This Java 8 quiz is designed to test your skills with modern Java features. It focuses on practical understanding, output-based questions, and advanced concepts commonly asked in interviews and real-world development.

Practice Java 8 MCQs with Detailed Explanations

Answer at least 12 questions to submit.

31.
Medium
Which Java version introduced var for local variables?
32.
High
What is the main purpose of Spliterator?
33.
High
Which stream operation is stateless?
34.
Medium
What does Optional.map() return?
35.
Medium
Which collector joins stream elements into a single String?
36.
Medium
What is the main advantage of the new Date-Time API?
37.
Medium
Which method executes an action if Optional has a value?
38.
High
Which stream operation may change encounter order?
39.
Medium
Which interface represents a supplier of results?
40.
Medium
What will be the output? IntStream.range(1, 5).sum();
41.
High
Which Java version made G1 the default garbage collector?
42.
Medium
Which stream operation removes duplicate elements?
43.
Medium
Which Java feature allows methods to be referenced without invocation?
44.
High
Which method converts an Optional to a Stream?
45.
High
Which Java release introduced records?
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