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After the completion of the DMA transfer, the processor is notified by __________

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After the completion of the DMA transfer, the processor is notified by __________

(a) Acknowledge signal

(b) Interrupt signal

(c) WMFC signal

(d) None of the mentioned

This question was addressed to me in an online quiz.

The origin of the question is Direct Memory Access topic in portion Input/Output Organisation of Computer Architecture

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The correct answer is (b) Interrupt signal

Explanation: The controller raises an interrupt signal to notify the processor that the transfer was complete.

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