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Computer Basic Information

Computer Basic Information
A hybrid computer uses a _____ to convert digital signals from a computer into analog signals.

Demodulator
None of these
Modulator
Modem
Decoder

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Computer Basic Information
Which of the following can be output by a computer?

computer-usable data or information
All of these
voice
text
graphics

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Computer Basic Information
All inputs must be in ON position to have an output is known as

NOT gate
XOR gate
AND gate
OR gate
None of these

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Computer Basic Information
A system program which helps the execution of user programs is known as

Application program
Utilities
System software
Batch operating system
None of these

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Computer Basic Information
The control unit of a microprocessor

accepts input data from a keyboard
None of these
Performs arithmetic / logic / functions
stores data in the memory
All of these

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Computer Basic Information
The bar code which is used on all types of items, is read by a scanning device directly into the computer.What is the name of this scanning device?

OCR
Wand
MICR
None of these
Laser scanner

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