What happens when a DMA transfer is completed?
2025
What happens when a DMA transfer is completed?
- A.
CPU halts permanently
- B.
The disk stops spinning
- C.
The bus is permanently assigned to the I/O device
- D.
The controller causes an interrupt to notify the CPU
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Correct answer: D
When a Direct Memory Access (DMA) transfer completes, the DMA controller sends an interrupt signal to the CPU. This notification informs the processor that data movement between memory and the I/O device is finished, allowing it to resume normal operations or handle the completed data.