79.File shrinks the size of a file so it requires less storage space. ( )
A. compression
B. defragmenting
C. synthesizing
D. scanning
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28.Installed on the original IBM PCs, used a command-line interface that simply displayed a “prompt” such as C:\ on the screen and waited for users to type commands. ( )
A. Linux
B. DOS
C. Unix
D. HTML
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49.A converts printed images into bitmap graphics that they can be viewed and edited with graphics software. ( )
A. digital camera
B. digital video camera
C. scanner
D. touch-sensitive screen
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144._gather,format,and present information in the database, and can typically be printed, published on the
Web,or e-mailed to other people.
A. Forms
B. Links
C. Reports
D. Queries
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52.High-speed printers, optical character readers, computer-controlled robots, package scanners, and UPC scanners can all be considered peripheral devices.
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108.The primary purpose of software—your computer’s operating system, device drivers, and utilities—is to help the computer carry out its basic operating function. ( )
A. database
B. system
C. application
D. productivity
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120.Screen brightness can be measured as ( )
A. luminance
B. contrast ratio
C. either a.or b.
D. neither a. nor b.
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29.Few PC display devices have the capability to display millions of colors; most, however, display thousands of colors. ( )
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4.Most computers include a CD drive or DVD drive that uses a magnet to read data stored on plastic-coated CDs and DVDs.} ( )
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35.Examples of input that a computer can accept include . ( )
A. all of the above
B. instructions from a computer program
C. audio signals from a microphone
D. temperatures from a thermostat
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