Which one of the following facilitates the transfer of bulk data from hard disk to main memory with the highest throughput?
(A)
DMA based I/O transfer
(B)
Interrupt driven I/O transfer
(C)
Polling based I/O transfer
(D)
Programmed I/O transfer
Answer: (A)
Explanation:
The speed of the CPU limits data transfer between a fast storage medium such as a magnetic disc and a memory unit. As a result, we can allow peripherals to connect directly with one another via memory buses, eliminating the need for the CPU’s interference, making DMA the optimal option for bulk data transmission.
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