何谓disk quota？（）

A:磁盘空间配额 B:磁盘大小 C:磁盘缓冲区 D:磁盘快取

Floppy disk fail的意思是（）。

A:硬盘故障 B:无法驱动光驱 C:无法驱动软驱 D:无法引导软驱

DOS是DISK OPERATING SYSTEM的简称。( )

The disk I bought from the store yesterday was found to be （）

A:empty       B:blank       C:vacant   D:hollow

Since RAM is only active when the computer is on, your computer uses disk to store information even when the computer is off. Which of the following is true ______

A:When your computer is on, only RAM is used to store information B:When your computer is on, only disk drives are used to store information C:When your computer is oft, only RAM is used to store information D:When your computer is off, only disk drives are used to store information

Since RAM is only active when the computer is on, your computer uses disk to store information even when the computer is off. Which of the following is true ______

A:When your computer is on, only RAM is used to store information. B:When your computer is on, only disk drives are used to store information. C:When your computer is off, only RAM is used to store information. D:When your computer is off, only disk drives are used to store information.

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 a

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

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 a

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