COMPUTER ARCHITECTURE
INPUTOUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It tells the color and size. information. It can tell the names and locations where the jeans are sold. It can give links to the store’s web site. All this inside a simple square.
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It tells the store’s web site.
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It detects if the barcode was scanned correctly.
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The locations of where the item is sold.
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Detailed explanation-1: -➢ The last number is called a check digit which enables the scanner to determine if the barcode was scanned correctly. Traditional barcodes systematically represent data by varying the widths and spacings of parallel lines, and may be referred to as linear or one-dimensional (1D).
Detailed explanation-2: -The last digit of the UPC code is called a check digit. In the case of our example, 7 This digit lets the scanner (and the computer attached to it) know if the number was scanned properly or not. The number at the far right is the check digit.
Detailed explanation-3: -Barcode scanners record and translate barcodes from the image you recognize into alphanumeric digits. The scanner then sends that information along to a computer database, either through a wired connection or wirelessly (depending on the model).
Detailed explanation-4: -A barcode reader works by directing a beam of light across the barcode and measuring the amount and pattern of the light that is reflected. The scanner converts the light energy into electrical energy, which is then converted into data by the decoder and forwarded to a computer.