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For a Hamming code protecting m=11 data bits with single-error correction, what is the minimum number r of parity bits required?

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Correct Answer: B. 4

Explanation: Hamming SEC requires 2^r ≥ m+r+1. With m=11, r=4 gives 16 ≥ 11+4+1 = 16, so four parity bits are sufficient.

Reference: Standard digital electronics: Hamming code

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