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Gate2018 cs Q24

24Let ⊕ and ⊙ denote the Exclusive OR and Exclusive NOR operations, respectively. Which one of the following is NOT CORRECT?
  • Option : D
  • Explanation :
    (P ⊕ P) ⊕ Q = (P ⊙P) ⊕ Q false
    (P ⊕ P) ⊕ Q = 1 ⊕ Q = Q
    (P ⊙ P) ⊕ Q = 0 ⊕ Q = Q
    (P ⊕ P) ⊕ Q ≠ (P ⊙ P) ⊕ Q
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