Gate CS-2017-1 Question Paper With Solutions

Q. 60 Consider a combination of T and D flip-flops connected as shown below. The output of the D flipflop
is connected to the input of the T flip-flop and the output of the T flip-flop is connected to the
input of the D flip-flop.

Initially, both Q and Q₁ are set to 1 (before the 1st clock cycle). The outputs

(A) Q₁ Q after the 3rd cycle are 11 and after the 4th cycle are 00 respectively

(B) Q₁ Q after the 3rd cycle are 11 and after the 4th cycle are 01 respectively

(C) Q₁ Q after the 3rd cycle are 00 and after the 4th cycle are 11 respectively

(D) Q₁ Q after the 3rd cycle are 01 and after the 4th cycle are 01 respectively

Answer: (B)

Explanation: