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Operating SystemDescribe the fundamental role of "Process Scheduling" in a multiprogramming operating system. Identify and explain at least three scheduling criteria.20247mOPERATING SYSTEMDescribe the differences among short-term, medium-term, and long-term scheduling.20227mOPERATING SYSTEMDescribe the differences among short term, medium-term, and long-term scheduling.20237mOPERATING SYSTEMExplain the difference among short-term, medium-term and long-term scheduling.20197m
PreviousSuppose that a disk drive has 5000 cylinders, numbered 0 to 4999. The drive is currently serving a request at cylinder 143, and the previous request was at cylinder 125. The queue of pending request, in FIFO order is: 86, 1470, 913, 1774, 948, 1509, 1022, 1750, 130 Starting from the current head position, applying Shortest-seek-time-first (SSTF) algorithm find what is the total distance (in cylinders) that the disk arm moves to satisfy all the pending requests.NextConsider the main memory with the capacity of 4 page frames. Assume that the pages of a process are referenced in the order as given below: 1, 3, 4, 4, 3, 2, 1, 7, 5, 6, 4, 2, 1, 2 Which of FIFO or LRU would be better in this case as a page replacement policy? Why?