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Whenever an I/O device wants to transfer the data to or from memory, it sends the DMA request (DRQ) to the ____

68. Whenever an I/O device wants to transfer the data to or from memory, it sends the DMA request (DRQ) to the ____.

1. DMA
2. DMA Controller
3. Data Controller
4. Device drivers

Answer: B) DMA Controller

Explanation:

Whenever an I/O device wants to transfer the data to or from memory, it sends the DMA request (DRQ) to the DMA controller accepts this DRQ, and asks the CPU to hold for a few clock cycles.