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    Question
    HLPaper 1
    1.

    Identify one application of a queue.

    [1]
    Verified
    Solution

    Identify one application of a queue

    • Print queue 1 mark
    • CPU task scheduling 1 mark
    • Simulation of a real-life scenario (call centre, supermarket queue) 1 mark
    • Playlist queue 1 mark
    • Interrupt queues 1 mark
    • Queues in routers and switches 1 mark
    • Mail queues 1 mark
    • Buffers in devices like keyboard 1 mark
    • Website traffic 1 mark

    Reward other reasonable responses

    2.

    Identify one characteristic of a queue.

    [1]
    Verified
    Solution

    Characteristic of a Queue

    • A linear (abstract) data structure 1 mark
    • First in First out/FIFO 1 mark
    • Elements can only be added at one end (rear/tail) and removed from the other (front/head) 1 mark
    • Once a new element is inserted into the queue (enqueue), all the elements inserted before the new element in the queue must be removed (dequeue), to remove the new element 1 mark

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