Question :

Why are vacuum tubes also called valves?


A) Because they can amplify the weak signals and make them strong
B) Because they can stop or allow the flow of current
C) Both of above
D) None of above

Answer : B

Description :



Related Questions - 1


Which of the following is not an input device ?


A) OCR
B) Optical scanners
C) Voice recognition device
D) COM (Computer Output to Microfilm)

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Related Questions - 2


Which of the following is not processing ?


A) arranging
B) manipulating
C) calculating
D) gathering

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Related Questions - 3


A computer consists of


A) A central processing unit
B) A memory
C) Input and output unit
D) All of the above

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To produce high quality graphics (hardcopy) in color, you would want to use a/n


A) RGB monitor
B) Plotter
C) Ink-jet printer
D) Laser printer

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Related Questions - 5


Before a disk drive can access any sector record, a computer program has to provide the record’s disk address. What information does this address specify?


A) Track number
B) Sector number
C) Surface number
D) All of above

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