Introduction to Digital Systems – 36

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36. What is a digital-to-analog converter?

(a) It takes the digital information from an audio CD and converts it to a usable form.
(b) It allows the use of cheaper analog techniques, which are always simpler.
(c) It stores digital data on a hard drive.
(d) It converts direct current to alternating current.

Answer
Answer : (a)
Explanation
Explanation : A DAC converts an abstract finite-precision number (usually a fixed-point binary number) into a concrete physical quantity (e.g., a voltage or a pressure).
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