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Counters Online Exam Quiz

Important questions about Counters. Counters MCQ questions with answers. Counters exam questions and answers for students and interviews.

1. Parallel in/parallel out registers have parallel input and output busses.

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2. A glitch is a short pulse resulting in an undesired result in a digital circuit.

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B : False

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3. The term synchronous refers to events that do not occur at the same time.

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B : False

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4. The modulus of a counter is the actual number of states in its sequence.

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A : True

B : False

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5. All decade counters are BCD counters.

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6. In VHDL, when we want to remember a value it must be stored in a VARIABLE.

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7. The term synchronous , as applied to counter operations, means that the counter is clocked such that each flip-flop in the counter is triggered at the same time.

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B : False

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8. A ripple counter is an asynchronous counter.

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B : False

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9. Shift registers are used to store and transfer data.

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A : True

B : False

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10. A J-K flip-flop excitation table lists the present state, the next state, and the J and K levels required to produce each transition.

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1. Counters are generally decoded in order to determine their count state.

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2. Phototransistors have varying resistance from collector to emitter, depending on how much light strikes them.

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B : False

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3. An asynchronous counter differs from a synchronous counter in the method of clocking.

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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.

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

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6. In a synchronous counter, each state is clocked by the same pulse.

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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.

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B : False

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8. Another term used to describe up/down counters is bidirectional .

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A : True

B : False

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9. A state diagram is a table of states.

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A : True

B : False

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10. All flip-flops in an asynchronous counter change states at the same time.

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A : True

B : False

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