COGNITIVE ASSESSMENT
What method is used to read a bar code?
A. The magnetic bar codes are converted by a bar code reader into a form that a computer can process.
B. A laser translates the bars on the bar code into digital signals that are stored in RAM.
C. A laser scanner produces light beams that pass through a scanner filter which then translates the light patterns into digital patterns that can be interpreted by the CPU.
D. A bar code reader uses laser beams to read bar codes.
Answer: D
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