9. software is a category of system software that includes programs designed to optimize your computer’s performance, protect data, and facilitate communication. ( )
A. Zip
B. Utility
C. Compression
D. Usability
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23.A CD (compact disc) provides 1650–1700 MB of storage space for computer data. ( )
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42.Screen brightness can be measured as . ( )
A. contrast ratio
B. either a. or b.
C. luminance
D. neither a. nor b.
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133._software includes templates,master
slides, and themes that can be used to ensure that all presentations
created by an organization,person, or
department have a uniform style.
A. Database
B. Presentation
C. Accounting
D. Desktop publishing
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159.A_ is basically a wireless local area network that provides access to guests using notebook com PDAs, or other mobile devices.
A. Wi-Fi hotspot
B. LAN
C. WAP
D. Bluetooth Center
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146.A_typically connects personal computers within a very limited geographical area, usually within single building.
A. BAN
B. LAN:local area network
C. WAN wide area network
D. NAN
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3.RAM is a temporary holding area for data, application program instructions, and the operating system.( )
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40.The mouse is the most important input device on desktop and notebook computers.
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81.software is designed to help you create, manipulate, and print graphics. ( )
A. Video
B. Camera
C. Graphics
D. Presentation
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141.The screen shown in the figure above displays a( )_interface,which simply
displays a "prompt" and waits for
users to type commands.
A. command-line
B. operator-input
C. user-input
D. operator-command
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