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Digital ElectronicsError Detection Codes

A parity system using one parity bit can reliably detect which class of errors in a transmitted word?

  • AAny odd number of bit errors
  • BEvery even number of bit errors
  • CAll burst errors regardless of length
  • DEvery possible error pattern
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Correct Answer: A. Any odd number of bit errors
Explanation: A single parity check changes whenever an odd number of bits are inverted, so all odd-number error patterns are detected; even-number patterns can escape detection.
Reference: Standard digital electronics: parity
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