Java 8 Objective Questions and Answers - Set 3

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. This is part 3 of the series.

Practice Java 8 MCQs with Detailed Explanations

Answer at least 12 questions to submit and verify answers.

31 Which Java version introduced var for local variables? Medium

32 What is the main purpose of Spliterator? High

33 Which stream operation is stateless? High

34 What does Optional.map() return? Medium

35 Which collector joins stream elements into a single String? Medium

36 What is the main advantage of the new Date-Time API? Medium

37 Which method executes an action if Optional has a value? Medium

38 Which stream operation may change encounter order? High

39 Which interface represents a supplier of results? Medium

40 What will be the output? IntStream.range(1, 5).sum(); Medium

41 Which Java version made G1 the default garbage collector? High

42 Which stream operation removes duplicate elements? Medium

43 Which Java feature allows methods to be referenced without invocation? Medium

44 Which method converts an Optional to a Stream? High

45 Which Java release introduced records? High