7. Where should the left and right arrows be directed in order that the state diagram illustrated detect the input sequence X = 0011 with no overlap?

  1. Left: a Right: c
  2. Left: b Right: b
  3. Left: b Right: a
  4. Left: c Right: b
  5. Left: c Right: a

4 is WRONG. The left arrow is correct, however, the right arrow must go back to state a, since there is no overlap in the good sequence X=0011.

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