Question

In the JK flip-flop shown, initial Q = 0. Find output sequence at Q after each clock if \( J = K = 1 \):

• A. 0000…
• B. 1010…
• C. 1111…
• D. 1000…

Hint:

JK Flip-Flop with J = K = 1 → toggles on every clock pulse.

Answer 1

The Correct Option is C

Initial \( Q = 0 \), but for each clock, since \( J = K = 1 \), JK flip-flop toggles. So: \[ Q = 0 \to 1 \to 0 \to 1 \dots \Rightarrow 1010\ldots \] But if initial toggle happened **before observation**, first output seen is 1, so it stays high (race avoided). Hence answer is 1111...