Exercise: Flip Flops

Questions for: Flip Flops

A flip-flop operation is described as a toggle when the result after a clock is ________.
A:
B:
C:
D:
change to opposite states
Answer: D
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The inputs on a 7474 D flip-flop are S, R, D, and CLK ________ is/are synchronous.
A:
Only S
B:
S and R
C:
Only D
D:
All of the above.
Answer: D
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An astable multivibrator is a circuit that ________.
A:
has two stable states
B:
is free-running
C:
produces a continuous output signal
D:
is free-running and produces a continuous output signal
Answer: C
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What type of multivibrator is a latch?
A:
Astable
B:
Monostable
C:
Bistable
D:
It depends on the type of latch.
Answer: C
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A gated S-R flip-flop goes into the CLEAR condition when ________.
A:
S is HIGH; R is LOW; EN is HIGH
B:
S is LOW; R is HIGH; EN is HIGH
C:
S is LOW; R is HIGH; EN is LOW
D:
S is HIGH; R is LOW; EN is LOW
Answer: B
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