COMPUTER ARCHITECTURE
INPUTOUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the relationship between a barcode and a barcode reader?
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The thick and thin lines making up a barcode are read by the barcode reader, which then forwards to the computer the information stored in that barcode
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The pattern of lines are set by the barcode reader to store information into the barcode
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The barcode is read by the barcode reader and printed onto labels to attach to products
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None of the above
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Explanation:
Detailed explanation-1: -Laser light is shone on the label surface and its reflection is captured by a sensor (laser photo detector) to read a bar code. A laser beam is reflected off a mirror and swept left and right to read a bar code Using laser allows reading of distant and wide bar code labels.
Detailed explanation-2: -A barcode reader or barcode scanner is an optical scanner that can read printed barcodes, decode the data contained in the barcode to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor for translating optical impulses into electrical signals.
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