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.
37. What has happened to the advances in digital technologies over the past three decades?
(a) Slowed down considerably
(b) Continued to increase, but at a decreasing rate
(c) Made excellent progress
(d) Nothing short of phenomenal
38. What is the typical invalid voltage for a binary signal?
(a) 0.7–2.8 volts
(b) 0.8–3 volts
(c) 0.8–2 volts
(d) 0.7–2.5 volts
39. Convert the fractional binary number 0001.0010 to decimal.
(a) 1.40
(b) 1.125
(c) 1.20
(d) 1.80
40. Convert the fractional binary number 10010.0100 to decimal.
(a) 24.50
(b) 18.25
(c) 18.40
(d) 16.25
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