Arrange the given steps required for a Direct Memory Access (DMA) transfer in the correct order.

(A) Initiate DMA transfer request

(B) Transfer data directly between peripheral and memory

(C) Processor grants DMA control over the system bus

(D) DMA controller completes data transfer and signals completion

1. A(C), (A), (B), (D)
2. B(A),(C),(B),(D)
3. C(A), (B), (C), (D)
4. D(C), (B), (A), (D)

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Correct answer: B. (A),(C),(B),(D)

Explanation

The device or controller requests DMA, the processor grants control of the bus, data moves directly between device and memory, and the controller signals completion (interrupt).