Assume a disk with 400 cylinders is accessing cylinder 50 now and just accessed and served a request on cylinder 51 before that. further assume that the fifo queue of pending requests is 20, 45, 60, 220, 250, 190. what order will the pending requests be satisfied using the following policies, and how many cylinders will the head need to move to satisfy these requests in each case? a. shortest seek time first (sstf)b. lookc. c-lookd. scane. c-scan

Acarnot refrigerator operates in a room in which the temperature is 21°c and of power when operating. if the food compartment of the refrigerator is consumes 3 kw to be maintained at 2°c, determine (a) the coefficient of performance of the cycle and (b) the rate of heat removal from the food compartment. refrigerator cycle that has a higher coefficient of performance than that of the discussed (e) is it possible to develop a carn ot refrigerator, operating between the same temperature limits? explain