flip-flops digital-electronics question and answers -Page 10

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Flip-Flops problems

1. A latch can act as a contact-bounce eliminator.
Options
A. True
B. False

Correct Answer: True

2. A one-shot is a special type of multivibrator that must be triggered to produce each output pulse.
Options
A. True
B. False

Correct Answer: True

3. When using edge-triggered flip-flops, the data is entered into the flip-flop on the leading edge of the clock, but the output does not change until the trailing edge of the clock.
Options
A. True
B. False

Correct Answer: False

4. In VHDL, each instance of a component is given a name followed by a semicolon and the name of the library primitive.
Options
A. True
B. False

Correct Answer: False

5. PRESET and CLEAR inputs are normally synchronous.
Options
A. True
B. False

Correct Answer: False

6. Edge-triggered flip-flops can be identified by the triangle on the clock input.
Options
A. True
B. False

Correct Answer: True

7. A J-K flip-flop and associated waveforms are shown below. The circuit is operating properly.
Options
A. True
B. False

Correct Answer: False

8. A D-type latch is able to change states and "follow" the D input regardless of the level of the ENABLE input.
Options
A. True
B. False

Correct Answer: False

9. A negative edge-triggered flip-flop will accept inputs only when the clock is LOW.
Options
A. True
B. False

Correct Answer: False

10. Latches are tristate devices whose state normally depends on asynchronous inputs.
Options
A. True
B. False

Correct Answer: False

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