Data Structure: Queues
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Questions and Answers

What is the primary characteristic of a queue data structure?

  • Elements are added and deleted from the same end.
  • Elements are arranged in a specific order based on priority.
  • Elements can be accessed from anywhere in the queue.
  • Elements are added at one end and deleted from the other end. (correct)

    • What would happen if an element is added to a full queue?

  • The queue will be reinitialized.
  • The queue will be resized to accommodate more elements.
  • An element will be removed from the front of the queue.
  • A queue overflow exception will be generated. (correct)

    • What is the purpose of the 'rear' pointer in a queue?

  • It points to the last element of the queue. (correct)
  • It points to the first element of the queue.
  • It points to the maximum size of the queue.
  • It points to the middle element of the queue.

    • What is a solution to the problem of 'rear' pointing to the last array position after a number of insertion and deletion operations?

    <p>Use a circular array.</p> Signup and view all the answers

    What is an example of a real-life scenario where a queue is used?

    <p>A printer job queue.</p> Signup and view all the answers

    What is the condition for the queue to be full?

    <p>size == queue.length</p> Signup and view all the answers

    What is the purpose of the next_index formula in the CircularQueue implementation?

    <p>To handle the circular nature of the queue</p> Signup and view all the answers

    What happens when the enqueue operation is called on a full queue?

    <p>An error message is printed and the operation is terminated</p> Signup and view all the answers

    What is the purpose of the front and rear indices in the CircularQueue implementation?

    <p>To keep track of the current indices of the queue</p> Signup and view all the answers

    What does the dequeue operation return when the queue is empty?

    <p>-1</p> Signup and view all the answers

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