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Why is a hash value used to verify file integrity?

Answer and explanation

Correct answer: The calculated value may differ if the file has changed

The governing concept is integrity checking with a deterministic digest. A hash function calculates a compact value from a file's bytes; comparing it with a trusted earlier value can reveal alteration or corruption. Therefore option D is correct. Hashing does not print, move, or grant permissions to a file, so A, B, and C are unrelated.

Related tags

IctHashFile-IntegrityData-VerificationUsing An Operating System And File ManagementIct (Information & Communication Technology) Skills IIct Information Communication Technology Skills IArtificial Intelligence

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