counters digital-electronics question and answers -Page 11

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Counters problems

1. Counters are generally decoded in order to determine their count state.
Options
A. True
B. False

Correct Answer: True

2. Phototransistors have varying resistance from collector to emitter, depending on how much light strikes them.
Options
A. True
B. False

Correct Answer: True

3. An asynchronous counter differs from a synchronous counter in the method of clocking.
Options
A. True
B. False

Correct Answer: True

4. When a J-K flip-flop is used in a circuit, we only have to consider the level at J and K at the active clock edge to know the states of the outputs.
Options
A. True
B. False

Correct Answer: False

5. The MOD number of a Johnson counter will always be equal to one-half the number of flip-flops in the counter.
Options
A. True
B. False

Correct Answer: False

6. In a synchronous counter, each state is clocked by the same pulse.
Options
A. True
B. False

Correct Answer: True

7. To design a divide-by-200 counter using synchronous counters, two 4-bit counters could be cascaded together to form an 8-bit counter.
Options
A. True
B. False

Correct Answer: True

8. Another term used to describe up/down counters is bidirectional.
Options
A. True
B. False

Correct Answer: True

9. A state diagram is a table of states.
Options
A. True
B. False

Correct Answer: False

10. All flip-flops in an asynchronous counter change states at the same time.
Options
A. True
B. False

Correct Answer: False

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