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The state diagram for a JKFF consists of :

  • A.One state
  • B.Two states
  • C.Three states
  • D.Four states

Answer: B

The state diagram of a JK flip-flop has two states.

A flip-flop stores one bit, so it has exactly two states, Q = 0 and Q = 1. The JK inputs only determine the transitions: J = 1 moves it from 0 to 1, K = 1 from 1 to 0, J = K = 1 toggles, and J = K = 0 holds.

Four is the number of input combinations of J and K, not the number of states; one or three states do not correspond to a one-bit memory.

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