CS 140 Final: CS 140cs140 final winter 2003
31 Jan 2019
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March 17, 2003 (total time = 165 minutes, total points = 165) 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 closed notes and closed book. You may not collaborate in any manner on this exam. You have 165 minutes (2 hours and 45 minutes) to complete the exam. Before starting, please check to make sure that you have all 22 pages. Name____________________ (1) (10 points) your nachos hw4 project partner adds a weird protection system to your project s file system. The protection system requires that in order to open a file a process must pass the message digest of the file as an additional argument to the open system call. Justify your answer. (b) describe a file system workload in which this kind of protection system would have large performance overhead.
