Consider the sequential circuit shown in the figure, where both flip-flops used are positive edge-triggered D flip-flops.

The number of states in the state transition diagram of this circuit that have a transition back to the same state on some value of \”in\” is ______ .

Note – This was Numerical Type question.
(A) 2
(B) 3
(C) 4
(D) None


Answer: (A)

Explanation: State Table :

Transition back to the same state means self loop, they are asking number of self loop states.
Number of self loop states are 2 ( which are 00 and 11).

Option (A) is CORRECT.

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