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Digital Electronics:: Digital Concepts MCQs

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57. 1/4 as a binary number would be ________.
A. 0.01
B. 0.11
C. 0.10
D. 0.00
Discussion
58. The invalid range for an input to TTL logic is from ________.
A. 0 to 0.8 V
B. 1.2 to 1.6 V
C. 0.8 to 2.0 V
D. 2.0 to 5.0 V
Discussion
59. In a typical digital system, Logic 0 is 0V–0.8V, and Logic 1 is ________.
A. 2–5V
B. 2.5–5V
C. 3.0–5.5V
D. 3.5–5.5V
Discussion
60. Once a signal is digitized, the information it contains does not ________ as it is processed.
A. complain
B. stiffen
C. compress
D. deteriorate
Discussion
61. The rise-time of a pulse is normally measured between the ________.
A. 0 and 100% level
B. 10% and 90% level
C. 30% and 70% level
D. 50% level on the leading edge to the 50% level on the trailing edge
Discussion
62. A logic circuit that can store one bit of information is a ________.
A. flip-flop
B. counter
C. gate
D. code converter
Discussion
63. The horizontal axis of an oscilloscope is normally calibrated in units of ________.
A. voltage
B. current
C. time
D. frequency
Discussion

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