I/O transfer

Which one of the following facilitates transfer of bulk data from hard disk to main memory with the highest throughput?

On a non-pipelined sequential processor, a program segment, which is a part of the interrupt service routine, is given to transfer $$500$$ bytes from an $${\rm I}/O$$ device to mem...

On a non-pipe-lined sequential processor, a program segment, which is a part of the interrrupt service routine, is given to transfer $$500$$ bytes from an $${\rm I}/O$$ device to m...

A Hard disk with a transfer rate of $$10Mbytes/second$$ is constantly transferring data to memory using $$DMA.$$ The processor runs at $$600MHz$$ and takes $$300$$ and $$900$$ cloc...