GATE | GATE-CS-2017 (Set 1) | Question 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 Q₀ and Q₁ are set to 1 (before the 1st clock cycle). The outputs
(A) Q₁ Q₀ after the 3rd cycle are 11 and after the 4th cycle are 00 respectively
(B) Q₁ Q₀ after the 3rd cycle are 11 and after the 4th cycle are 01 respectively
(C) Q₁ Q₀ after the 3rd cycle are 00 and after the 4th cycle are 11 respectively
(D) Q₁ Q₀ after the 3rd cycle are 01 and after the 4th cycle are 01 respectively


Answer: (B)

Explanation:
It can be observed from the diagram that :
Q₁ Q₀ after the 3rd cycle are 11 and after the 4th cycle are 01

Therefore, option B is correct.

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