COMPUTER HARDWARE COMPONENTS FUNCTIONS
COMPUTER OUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An reading device that uses laser beams to read bar codes by using lights patterns that pass through the bar code lines.
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A reading device that uses a light source to read characters, marks and codes and then converts them into digital data that a computer can process.
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A reading device that uses radio signals to communicate with a tag placed in or attached to an object, an animal or a person.
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A reading device that reads magnetic stripes on the back of cards.
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A reading device that reads text printed with magnetized ink.
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Detailed explanation-1: -A barcode reader 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.
Detailed explanation-2: -A barcode reader, also called a price scanner or point-of-sale (POS) scanner, is a hand-held or stationary input device used to capture and read information contained in a barcode.
Detailed explanation-3: -Laser scanners use a laser beam as a light source and typically employ oscillating mirrors or rotating prisms to scan the laser beam back and forth across the barcode. A photodiode then measures the reflected light from the barcode.
Detailed explanation-4: -Laser barcode scanners use a visible and repetitive “flashing” laser light beam, commonly used to track inventory and to enter purchases into a computerized management system. The scanner is a wonderful tool for providing fast and easy customer service in places like supermarkets and restaurants.