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