Java Queue MCQs with answers Page - 6

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 default ordering used by Java’s PriorityQueue?

  • (A) Insertion order
  • (B) Natural order
  • (C) Custom order
  • (D) Reverse order

A

Admin • 828.43K Points
Coach

Q. Which interface must be implemented to use custom ordering in PriorityQueue?

  • (A) Comparable
  • (B) Comparator
  • (C) Serializable
  • (D) Runnable

A

Admin • 828.43K Points
Coach

Q. Which method checks whether the queue contains a particular element?

  • (A) has()
  • (B) contains()
  • (C) check()
  • (D) equals()

A

Admin • 828.43K Points
Coach

Q. Which is a characteristic of DelayQueue?

  • (A) Immediate retrieval
  • (B) Thread safety without blocking
  • (C) Elements are ordered by delay expiration
  • (D) Random access of elements

A

Admin • 828.43K Points
Coach

Q. Which interface does not extend Queue in Java?

  • (A) Deque
  • (B) BlockingQueue
  • (C) ConcurrentLinkedQueue
  • (D) List

A

Admin • 828.43K Points
Coach

Q. What happens when an element is removed from an empty ConcurrentLinkedQueue?

  • (A) It throws an exception
  • (B) It blocks until data is available
  • (C) It returns null
  • (D) It returns 0

A

Admin • 828.43K Points
Coach

Q. Which queue supports ordering by priority?

  • (A) LinkedList
  • (B) ArrayDeque
  • (C) PriorityQueue
  • (D) SynchronousQueue

A

Admin • 828.43K Points
Coach

Q. Which method can be used to traverse a queue?

  • (A) forEach()
  • (B) traverse()
  • (C) iterate()
  • (D) walk()

A

Admin • 828.43K Points
Coach

Q. Which BlockingQueue implementation does not permit null elements?

  • (A) All BlockingQueue implementations
  • (B) Only LinkedBlockingQueue
  • (C) Only ArrayBlockingQueue
  • (D) Only PriorityBlockingQueue

A

Admin • 828.43K Points
Coach

Q. Which queue implementation is the most suitable for real-time delayed tasks?

  • (A) ArrayDeque
  • (B) PriorityQueue
  • (C) DelayQueue
  • (D) SynchronousQueue

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