Education platform for interview prep, online tests, tutorials, and live practice

Build skills with focused learning paths, mock tests, and interview-ready content.

WithoutBook brings subject-wise interview questions, online practice tests, tutorials, and comparison guides into one responsive learning workspace.

Search the library

Prepare Interview

Java Concurrency Interview Questions and Answers

1
2
3
4
5
6

Ques 16. What is the purpose of the CyclicBarrier class?

CyclicBarrier is a synchronization aid that allows a set of threads to wait for each other to reach a common barrier point before proceeding.

Is it helpful? Yes No Add Comment View Comments

Ques 17. Explain the concept of the Future and FutureTask in Java.

Future represents the result of an asynchronous computation, and FutureTask is a concrete implementation of the Future interface.

Is it helpful? Yes No Add Comment View Comments

Ques 18. What is the purpose of the Semaphore class?

Semaphore is a synchronization aid that allows a fixed number of threads to access a certain resource concurrently.

Is it helpful? Yes No Add Comment View Comments

Ques 19. Explain the concept of the Exchanger class.

Exchanger is a synchronization point at which threads can pair and swap elements within pairs.

Is it helpful? Yes No Add Comment View Comments

Ques 20. What is the purpose of the LockSupport class?

LockSupport provides low-level thread park and unpark mechanisms, useful for building higher-level synchronization abstractions.

Is it helpful? Yes No Add Comment View Comments

1
2
3
4
5
6

Most helpful rated by users:

Copyright © 2026, WithoutBook.