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GATE CSE 1993 | Question: 6-3

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For the initial state of $000$, the function performed by the arrangement of the $\text{J-K}$ flip-flops in figure is:

  1. Shift Register
  2. $\text{Mod- 3}$ Counter
  3. $\text{Mod- 6}$ Counter
  4. $\text{Mod- 2}$ Counter
  5. None of the above
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It is "Johnson counter" which is MOD2n counter where "n" number of FF so for this example its "6" .....if you want to visualize how 6 coming then  draw a the table and see the  flow of state will be like this here its "shifting" from one state to another 

Answer:- Mod6, shift register

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