# 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 (b) asynchronous BCD decade counter (c) synchronous BCD decade counter (d) BCD-to-decimal decoder

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105. A BCD counter has ________ states. (a) 8 (b) 9 (c) 10 (d) 11