A shop uses a handheld scanner to carry out a stock check. (a) Describe how the handheld scanner reads barcode data. [2] (b) State one advantage of using a ...
Question 1 Report
A shop uses a handheld scanner to carry out a stock check.
(a) Describe how the handheld scanner reads barcode data. [2]
(b) State one advantage of using a handheld scanner for stock checking rather than counting items manually. [1]
Answer Details
(a) A handheld barcode scanner reads barcode data in the following way:
- A light source (typically a laser beam or LED) is directed at the barcode printed on the item or label. [1]
- The light and dark bars of the barcode reflect different amounts of light. A light sensor (photodiode) in the scanner detects these reflections and converts the pattern into a digital code that represents the product's unique identifier. [1]
(b) Using a handheld scanner for stock checking is faster and more accurate than counting and recording items manually. [1] The scanner reads each product's barcode instantly and logs it electronically, eliminating the errors that occur when staff manually write down product codes or quantities.
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