os First Quiz_Answers

os First Quiz_Answers - Answers to the First Quiz of...

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Unformatted text preview: Answers to the First Quiz of Operating System By Ku-Yaw Chang 2004/10/20 (Wed.) 1. What is the main advantage of multiprogramming? ) Multiprogramming makes use of the CPU by overlapping the demands for the CPU and its I/O devices from various users. It attempt to increase CPU utilization by always having something for the CPU to execute. 2. What are the main differences between operating systems for mainframe computers and PCs? ) The design goals of operating systems for those machines are quite different. PCs are inexpensive, so wasted resources like CPU cycles are inconsequential. Resources are wasted to improve usability and increase software user interface functionality. Mainframes are the opposite, so resource use is maximized, at the expensive of ease of use. 3. What are the differences between a trap and an interrupt? What is the use of each function? ) An interrupt is a hardware-generated change-of-flow within the system. An interrupt handler is summoned to deal with the cause of the interrupt; control is then returned to the interrupted context...
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This document was uploaded on 10/08/2008.

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