Question One (30 marks)
Clearly explain the differences between the following early systems:
Multiprogrammed batch systems
Time sharing systems
Briefly explain two fundamental responsibilities of an operating system
Five, A through E, arrive at a computer center having estimated run-times of 10, 6, 2, 4 and 8 minutes. Their priorities are 3,5,2,1 and four respectively (with 1 being the highest priority). For each of the following scheduling algorithms. Draw a table and clearly show how the jobs would be processed. Also determine the mean process turnaround time.
Using the Algorithms below
NB: Assume that the time quantum is 1 minute
Briefly describe the following memory management terminologies
Locality of reference
Page replacement policy
Dirty page /dirty bit
Outline the various situations when the process schedule has to make scheduling decisions.
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