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Quiz: I/O Organisation

5 questionsNo time limitPass: 60%+10 XP on first pass

How the CPU talks to keyboards, disks and networks: programmed I/O (polling), interrupt-driven I/O, DMA and its modes, interrupt priority, memory-mapped vs isolated I/O, and disk access-time numericals solved step by step in Python.

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  1. Question 1

    Which I/O method makes the CPU repeatedly check a device's status register?

  2. Question 2

    Why do disks and network cards use DMA for bulk transfers?

  3. Question 3

    In cycle-stealing DMA, the DMA controller:

  4. Question 4

    What is the average rotational latency of a 7200 RPM disk?

  5. Question 5

    With memory-mapped I/O, device registers are accessed using: