Flips-Flops Questions and Answers

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Q11
What is another name for a one-shot?
  • A Monostable
  • B Multivibrator
  • C Bistable
  • D Astable
Answer: Option A
Q12
On a master-slave flip-flop, when is the master enabled?
  • A when the gate is LOW
  • B when the gate is HIGH
  • C both of the above
  • D neither of the above
Answer: Option B
Q13
One example of the use of an S-R flip-flop is as a(n):
  • A racer
  • B astable oscillator
  • C binary storage register
  • D transition pulse generator
Answer: Option C
Q14
What is the difference between the 7476 and the 74LS76?
  • A the 7476 is master-slave, the 74LS76 is master-slave
  • B the 7476 is edge-triggered, the 74LS76 is edge-triggered
  • C the 7476 is edge-triggered, the 74LS76 is master-slave
  • D the 7476 is master-slave, the 74LS76 is edge-triggered
Answer: Option D
Q15
Which of the following is correct for a gated D flip-flop?
  • A The output toggles if one of the inputs is held HIGH.
  • B Only one of the inputs can be HIGH at a time.
  • C The output complement follows the input when enabled.
  • D Q output follows the input D when the enable is HIGH.
Answer: Option D
Q16
With regard to a D latch, ________.
  • A the Q output follows the D input when EN is LOW
  • B the Q output is opposite the D input when EN is LOW
  • C the Q output follows the D input when EN is HIGH
  • D the Q output is HIGH regardless of EN's input state
Answer: Option C
Q17
How can the cross-coupled NAND flip-flop be made to have active-HIGH S-R inputs?
  • A It can't be done.
  • B Invert the Q outputs.
  • C Invert the S-R inputs.
Answer: Option C
Q18
When is a flip-flop said to be transparent?
  • A when the Q output is opposite the input
  • B when the Q output follows the input
  • C when you can see through the IC packaging
Answer: Option B
Q19
Master-slave J-K flip-flops are called pulse-triggered or level-triggered devices because input data is read during the entire time the clock pulse is at a LOW level.
  • A TRUE
  • B FALSE
Answer: Option B
Q20
Which of the following is correct for a D latch?
  • A The output toggles if one of the inputs is held HIGH.
  • B Q output follows the input D when the enable is HIGH.
  • C Only one of the inputs can be HIGH at a time.
  • D The output complement follows the input when enabled.
Answer: Option B

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