$14.$ Of programmed I$/$O$,$ interrupt$-$driven I$/$O$,$ DMA, or channel I$/$O$,$ which is most suitable for processing the I$/$O of a:

a$)$ Mouse

b$)$ Game controller

c$)$ CD

d$)$ Thumb drive or memory stick

Explain your answers.

$21.$ Define the terms seek time, rotational delay, and transfer time. Explain their relationship.

$27.$ Suppose a disk drive has the following characteristics:

$5$ surfaces

$1024$ tracks per surface

$256$ sectors per track

$512$ bytes$/$sector

$$ Track$-$to$-$track seek time of $8$ milliseconds

$$ Rotational speed of $7500$ RPM$.$

a$)$ What is the capacity of the drive?

b$)$ What is the access time?