Direct memory access, Operating System

A-  In a table format, compare between Programmed I/O, Interrupt -driven I/O, and Direct Memory Access (DMA) in terms of basic idea, Advantages, disadvantages, and the operating environment using each technique.

B-  Assume a disk drive with 16 sectors per track.  Show the order of the tracks considering the following cases:

        i- Single interleaving    ii- Double interleaving

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