MadeEasy Subject Test: Digital Logic - Flip Flop

Question

Consider a clocked sequential circuit as shown in the figure below. Assuming initial state to be Q1 Q0 = 00
For an input sequence X = 1010, the respective output sequence will be _______.

Answer 1

here D1 = X ex-or Q1 and D0 = Q1 ex-or Q0

 and initially Q1 Q0 X has value 0 0 0  ( LSB enter first ) , thus apply these values and find next states .

D = Qn+1

and Y = X' . Q1' +Q0

Answer 2

0111