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For transfer of data, devices inform the DMA through------? (1 Point)Bus request signal.DRQ.HLDADAK

Question

For transfer of data, devices inform the DMA through------?

  • Bus request signal.
  • DRQ.
  • HLD
  • DAK
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Solution

The answer to the question regarding how devices inform the Direct Memory Access (DMA) controller for the transfer of data is the DRQ (DMA Request) signal.

Explanation:

  1. Bus Request Signal: This signal is used in some communication protocols to request access to the system bus.
  2. HLD (Hold): This signal indicates that the DMA controller has gained control of the bus and the CPU should relinquish it.
  3. DAK (DMA Acknowledge): This signal is sent by the DMA controller back to the peripheral to acknowledge that the DMA request was received.

Among these options, the DRQ signal is specifically used by devices to notify the DMA controller that they have data ready for transfer, making it the correct choice.

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