CS 140 Midterm: CS 140cs140 midterm winter 2003
31 Jan 2019
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February 12th, 2003 (total time = 50 minutes, total points = 50) In recognition of and in the spirit of the stanford university honor code, i certify that i will neither give nor receive unpermitted aid on this exam. This examination is close notes and close book. You may not collaborate in any manner on this exam. You have 50 minutes to complete the exam. Before starting, please check to make sure that you have all 7 pages. Name___________________: (5 points) three processes share a system that contains four tape drives. The system allows the processes to reserve tape drives one at a time. Each process needs a maximum of two tape drives. Explain your answer: (4 points) explain how reference bits can be emulated on an architecture that has a normal paging system but lacks hardware support for reference bits. Segmentation has less internal fragmentation than standard paging schemes while paging schemes have less external fragmentation than segmentation schemes.
