# Counters – Exercise – 3

Exercise – 3

101. The counter circuit and associated waveforms shown below are for a(n) ________ counter, and the correct output waveform for QB is shown by waveform ________.

(a) synchronous, a
(b) asynchronous, b
(c) synchronous, c
(d) asynchronous, d

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102. The given circuit is a(n) ________.

(a) three-bit synchronous binary counter
(b) eight-bit asynchronous binary flip-flop
(c) two-bit asynchronous binary counter
(d) four-bit asynchronous binary counter

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103. Asynchronous counters are often called ________ counters.

(a) toggle
(b) ripple
(c) binary
(d) flip-flop

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104. The given circuit represents a(n) ________.

(a) four-bit binary counter
(d) BCD-to-decimal decoder

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105. A BCD counter has ________ states.

(a) 8
(b) 9
(c) 10
(d) 11