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GATE | GATE CS 2010 | Question 65

  • Difficulty Level : Medium
  • Last Updated : 19 Nov, 2018
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In the sequential circuit shown below,if the initial value of the output Q1Q0 is 00,what are the next four values of Q1Q0?

(A) 11, 10, 01, 00
(B) 10, 11, 01, 00
(C) 10, 00, 01, 11
(D) 11, 10, 00, 01

Answer: (A)

Explanation: We have t flip flop

Truth table of t flip flop



So q0 always inverted as t=1 always

So 1)q10=1

2)q0 =0

3)q0 =1

4)q0 =1

For q1 also t=1 always but clock is so we have to observe positive edge of clock I.e. when is q0 going from 0 -> 1

1)q1 =1

2)q1 =1

3)q1 =0

4)q1 =0

So final combination q0q1->(11,10,01,00) Ans (A)

Quiz of this Question

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