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 Serve

B．Shortest Seek Time First

C．Scan

D．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]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 s

[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] Firewall is a ___(74)___ mechanism used by organizations to protect their LANs fromInternet.(74)A. reliable B. stable C. peaceful D. security

[单选题]is a mechanism used for protecting the users outside of network from accessing some non-authorized computer resources.A．Network CardB．protocolC．FirewallD．Router

[单选题]Which is not the characteristic of operating system?A．resource managementB．transaction managementC．memory managementD．disk management

[单选题]F．irewall is a(74) mechanism used by organizations to protect their LANs from the Internet.A．reliableB．stableC．peacefulD．security

[单选题]F．irewall is a （74） mechanism used by organizations to protect their LANs from the Internet.（74）A． reliableB． stableC． peacefulD． security

[单选题]F．irewall is a _______ mechanism used by organizations to protect their LANs from the Internet．A．reliableB．stableC．peacefulD．SecurityA．B．C．D．