A disk scheduling mechanism in an operating system causes the disk arm to sweepbackand forth across the disk Surface servicing a

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问题 A disk scheduling mechanism in an operating system causes the disk arm to sweepbackand forth across the disk Surface servicing all requests in its path. This is a(73).

选项 A、First Come First Serve
B、Shortest Seek Time First             
C、Scan
D、None of the above

答案C

解析 译文:操作系统的磁盘调度机制引起磁盘臂在磁盘表面前后掠动,这叫作扫描。
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