Exam-style question
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Which of the following Boolean expressions represents an odd parity function for inputs A, B, C?.
- A.XOR gate chain for A, B, C.
- B.AND gate for A, B, C.
- C.OR gate for A, B, C.
- D.Majority gate for A, B, C.
Model answer
What a good answer should say
- XOR gate chain for A, B, C.
Explanation
Why this works
Formula/rule: XOR operation for parity. Substitution: F = A⊕B⊕C.
Working: A XOR B XOR C outputs 1 when an odd number of inputs are 1. Answer: XOR gate chain for A, B, C.
Conclusion: This expression outputs 1 when an odd number of inputs are 1.
Common mistake
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