COMPUTER FUNDAMENTALS

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COMPUTER HARDWARE

INPUT DEVICES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Another type of barcode is the Quick Response (QR) Code. This is made up of a matrix of filled-in dark squares on a light background.
A
Yes
B
No
C
Either A or B
D
None of the above
Explanation: 

Detailed explanation-1: -The main difference between barcodes and QR codes is one of physical dimensions. Barcodes can be scanned in a line. This means that data is limited to what can be placed in that one stretch of stripes. QR codes, on the other hand, add another dimension from which information can be written and scanned.

Detailed explanation-2: -QR codes are composed of several parts: data, position markers, quiet zone and optional logos. The data in a QR code is a series of dots in a square grid. Each dot represents a one and each blank a zero in binary code, and the patterns encode sets of numbers, letters or both, including URLs.

Detailed explanation-3: -Three corners of the QR Code contain the finder pattern, a nested series of black and white squares that, when detected by an optical scanner and interpreted by software, allow the scanning device to determine the orientation of the QR Code.

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