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 ( ).

[单选题]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) ．(73) A．First Come First ServeB．Shortest Seek Time FirstC．ScanD．None of the above

[单选题]A． disk scheduling mechanism in an operatingsystem causes the disk arm to sweepback and forth across the disk surface servicing all requests in its path. This is aA．First Come First ServeB．Shortest Seek Time FirstC．ScanD．None of the above

[单选题]A disk scheduling mechanism in an operating system causes the disk arm to sweepback and forth across the disk surface servicing all requests in its path. This is a （） :（）A. First Come First Serve B. Shortest Seek Tn-ne FirstC. Scan D. None of the abo

[单选题]Disk boot failure insert system disk and pressenter是什么意思（）A .系统错误引起文件丢失B .内存条问题引起文件丢失C .系统问题电子盘丢失D .系统问题引起文件丢失

[单选题]若在屏幕上出现“NO System disk o rdisk error”则表示（）。A . 机器出现故障B . 未插系统盘和磁盘C . 内存检查出故障D . 某外部设备出故障

[单选题]If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, theA．oil has a tendency to emulsify in the bowlB．purifier will act as a clarifier at the discharge ringC．oil will be lost through the water discharge portsD．o

[单选题]When reassembling the bowl of a disk-type centrifuge, the bowl or locking ring is rotated （）.A . clockwise, due to the bowl rotating clockwiseB . clockwise, due to the bowl rotating counterclockwiseC . counterclockwise, due to the bowl rotating clock

[试题]When should data be set to disk for safekeeping during the ETL?简述ETL过程中哪个步骤应该出于安全的考虑将数据写到磁盘上？

[单选题]The smallest physical units on a hard disk are called( )A.TracksB.ClustersC

[单选题]An operating system is ( ).A.the highest layer of softwareB.the lowest laye