COMPUTER HARDWARE
OUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Barcode reader
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Chip Reader
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RFID Reader
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Magnetic Stripe Reader
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Detailed explanation-1: -A Barcode reader or Barcode scanner is an electronic input device which is able to scan and decode barcodes. These devices use optical technology such as infrared light.
Detailed explanation-2: -Barcode contains information about a product like; price & weight of the product, date of manufacturing and expiry, name of the manufacturer etc. Barcode is allocated by an international institution set up for this purpose. Every product has a unique barcode all over the world.
Detailed explanation-3: -To save a barcode image to the database, it is necessary to create a varbinary data type column in the database table. The image must be saved as a MemoryStream and then converted to image bytes that are stored in the database column of the varbinary type, as demonstrated in the code example given below.
Detailed explanation-4: -A barcode reader is a handheld optical scanner that includes a lens, light sensors and light source to translate the optical data and impulses into the electrical impulse. A barcode generally consists of a decoder circuit that helps to analyse the data in the image printed in the barcode.