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Computer Science for IGCSE & O level - Data Transmission (Section 2 - No. 40)

Which of the following methods is most effective in detecting an error during data entry where the order of two digits is swapped?
A simple parity check.
A checksum calculation.
Echo check.
Encryption

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Checksums are better suited for detecting transposition errors than simple parity checks, which are more prone to missing them.

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