Which of the following devices uses both light and a lens to facilitate data warehousing?

The correct answer is C. Barcode reader. A barcode reader (scanner) uses a light source (laser or LED) and an optical lens to illuminate and capture the pattern of bars and spaces in a barcode. The reflected light is decoded into data that can be entered into a system or database - a process often described as data…

Hardware

Question

Which of the following devices uses both light and a lens to facilitate data warehousing?

Options

ADigitizer
BTouch screen
CBarcode reader
DCamera

How the community answered

(51 responses)

A
4% (2)
B
8% (4)
C
86% (44)
D
2% (1)

Explanation

A barcode reader (scanner) uses a light source (laser or LED) and an optical lens to illuminate and capture the pattern of bars and spaces in a barcode. The reflected light is decoded into data that can be entered into a system or database - a process often described as data collection or 'warehousing' at the input level. Digitizers capture analog signals, touch screens detect touch input, and cameras capture images but are not specifically designed around this light-plus-lens barcode-decoding workflow.

Topics

#barcode reader#input devices#optical scanning#data capture

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