31. Once a signal is digitized, the information it contains does not ________ as it is processed.
(a) complain
(b) stiffen
(c) compress
(d) deteriorate
32. Which of the following is not an analog device?
(a) Thermocouple
(b) Current flow in a circuit
(c) Light switch
(d) Audio microphone
33. Digital representations of numerical values of quantities may BEST be described as having characteristics:
(a) that are difficult to interpret because they are continuously changing.
(b) that vary constantly over a continuous range of values.
(c) that vary in constant and direct proportion to the values they represent.
(d) that vary in discrete steps in proportion to the values they represent.
34. How many binary bits are necessary to represent 748 different numbers?
(a) 9
(b) 7
(c) 10
(d) 8
35. The parallel transmission of digital data:
(a) is much slower than the serial transmission of data.
(b) requires only one signal line between sender and receiver.
(c) requires as many signal lines between sender and receiver as there are data bits.
(d) is less expensive than the serial method of data transmission.
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