MCQ Practice Question

The race-around condition in a level-triggered JK flip-flop can occur when?

  • AJ = K = 0
  • BJ = 0, K = 1
  • CJ = K = 1 and the clock pulse is sufficiently wide
  • DJ = 1, K = 0 only
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Correct Answer: C. J = K = 1 and the clock pulse is sufficiently wide
Explanation: When J = K = 1, repeated toggling can occur during a sufficiently long active clock level if the propagation delay permits multiple changes.
Reference: Standard digital electronics: race-around condition
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