Java Queue MCQs with answers Page - 8

You will find multiple-choice questions (MCQs) related to #Java Queue here. Go through these questions to prepare effectively for your upcoming exams and interviews.

To view the correct answer for any question, simply click the "Show Answer" button.

Have a question to share? Click on "Add Question" to contribute!

A

Admin • 828.43K Points
Coach

Q. What is the main difference between a Deque and a Queue?

  • (A) Deque allows nulls
  • (B) Deque allows insertion/removal from both ends
  • (C) Queue allows thread-safety by default
  • (D) Queue allows only stack-like operations

A

Admin • 828.43K Points
Coach

Q. Which class is an unbounded thread-safe queue based on linked nodes?

  • (A) ConcurrentLinkedQueue
  • (B) LinkedBlockingQueue
  • (C) ArrayBlockingQueue
  • (D) SynchronousQueue

A

Admin • 828.43K Points
Coach

Q. Which Queue method is suitable when blocking behavior is not desired?

  • (A) put()
  • (B) take()
  • (C) offer()
  • (D) wait()

A

Admin • 828.43K Points
Coach

Q. Which of the following can be used as both stack and queue?

  • (A) ArrayList
  • (B) Deque
  • (C) PriorityQueue
  • (D) Set

A

Admin • 828.43K Points
Coach

Q. Which method blocks until space is available in BlockingQueue?

  • (A) add()
  • (B) enqueue()
  • (C) put()
  • (D) offer()

A

Admin • 828.43K Points
Coach

Q. Which method blocks until an element becomes available for removal?

  • (A) take()
  • (B) poll()
  • (C) remove()
  • (D) peek()

A

Admin • 828.43K Points
Coach

Q. What does `peek()` return when the queue is empty?

  • (A) null
  • (B) 0
  • (C) throws exception
  • (D) false

A

Admin • 828.43K Points
Coach

Q. Which queue implementation is NOT thread-safe?

  • (A) PriorityQueue
  • (B) LinkedBlockingQueue
  • (C) ConcurrentLinkedQueue
  • (D) SynchronousQueue

A

Admin • 828.43K Points
Coach

Q. Which queue class in Java implements Comparable elements by priority?

  • (A) PriorityQueue
  • (B) ConcurrentLinkedQueue
  • (C) LinkedBlockingQueue
  • (D) Deque

A

Admin • 828.43K Points
Coach

Q. Which class allows elements to expire after a delay and appear in natural order?

  • (A) DelayQueue
  • (B) PriorityQueue
  • (C) LinkedList
  • (D) ArrayBlockingQueue

Browse More Tags

Click on tag to learn MCQs of that tag.
What's Tag

As you may know, questions are organized under broad categories. Each category can include various types of questions. For example, the "History" category might contain questions about the Revolt of 1857, Shivaji Maharaj, Ancient History, Buddhism, and more.

To further refine this organization, we've introduced tags, which act as sub-categories to group questions more specifically.

Verified users can add tags to any question. If you have any suggestions regarding this system, we'd love to hear from you. Contact Us

Learn More