Reference no: EM132182359
Question: 1. What are the three reasons that buffering is performed?
2. What is the least privilege principle? Why such a principle aid in the creation of protection systems?
3. Consider the following request queue for disk cylinders:
75, 168, 92, 22, 55, 78, 39, 82, 157, 99
Using following disk scheduling algorithms, find the total head movements using schematic diagram for a disk of 200 cylinders (0-199). It is assumed that read write head is initially present at cylinder number 50.
a. First Come First Serve (FCFS)
b. Shortest Seek Time First (SSTF)
4. Why is DMA used for devices that execute large transfers?