The best way to test the operational effectiveness of a data backup procedure is to perform a complete restoration of every file to a clean system and verify that there has not been any data corruption or loss. This will ensure that the backup procedure can successfully recover the data in the event of a disaster or incident. The other options are not sufficient to test the operational effectiveness of a data backup procedure, as they do not involve actually restoring the data and verifying its integrity and usability. References = How to review and test backup procedures to ensure data restoration; HOW TO TEST DATA BACKUPS: A BRIEF GUIDE; How to Test a Database Backup
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