Java Queue MCQs with answers Page - 1

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.

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A

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Q. Which interface in Java represents a queue data structure?

  • (A) List
  • (B) Set
  • (C) Queue
  • (D) Map

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Q. Which class implements a FIFO queue in Java?

  • (A) LinkedList
  • (B) HashSet
  • (C) ArrayList
  • (D) TreeSet

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Q. Which method retrieves and removes the head of the queue?

  • (A) peek()
  • (B) poll()
  • (C) top()
  • (D) get()

A

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Q. Which method only retrieves, but does not remove, the head of the queue?

  • (A) peek()
  • (B) poll()
  • (C) pop()
  • (D) head()

A

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Q. Which method throws an exception if the queue is empty while retrieving the head?

  • (A) poll()
  • (B) peek()
  • (C) element()
  • (D) get()

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Q. Which class implements a priority queue in Java?

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

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Q. Which queue implementation is thread-safe and supports blocking operations?

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

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Q. What type of queue is best for implementing stacks in Java?

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

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Q. Which method adds an element to the queue and throws an exception if full?

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

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Q. Which method adds an element to the queue and returns false if full?

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

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