CS 140 Midterm: CS 140 CS140midtermFall2006
31 Jan 2019
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October 27, 2006 (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 8 pages. Cs140 midterm fall 2006: (8 points) at a recent conference keynote talk the speaker said that modern operating systems use page flipping to avoid copying data. Hint: assume you have an operating system that supports system calls that allow processes (each with its own address space) to pass messages between each other (e. g. send/receive message on a pipe-like abstraction. ) Consider how an operating system could implement this service without physically touching the bytes of the message.
