题目内容

_____ programs reduce the size of files so they require less storage space.

A. File compression
B. Device driver
C. Virtualization
D. Language translator

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The _____ utility program eliminates unneeded files on your hard disk.

A. File Compression
B. Disk Cleanup
C. Virtualization
Disk Defragmenter

_____ programs make copies of files to be used in case the originals are lost or damaged.

A. File compression
B. Disk defragmenter
C. File history
Disk cleanup

In a virtualized environment, the operating system of each virtual machine is known as the _____ operating system.

A. host
B. client
C. home
D. guest

_____ programs guard your computer system against viruses or other damaging programs that can invade your computer system.

Antivirus
B. Disk defragmenter
C. File history
Disk cleanup