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Digital ElectronicsFlip-Flops

For a JK flip-flop, if J = 1 and K = 1, the next state is?

  • AAlways 0
  • BAlways 1
  • CThe complement of the present state
  • DEqual to the present state
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Correct Answer: C. The complement of the present state
Explanation: With J = K = 1, a JK flip-flop toggles, so Q(next) is the complement of Q(present).
Reference: Standard digital electronics: JK flip-flop characteristic
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