Backups must be periodically tested to ensure that data can be restored from them because a backup is only useful if you can restore from it. What is INCORRECT about testing data backups?

Ideally, it would be great to test the backup's integrity after each backup, but the time required would make it impractical. They should be tested frequently, at least once per month or more frequently if you can, and certainly after a system has undergone a major modification. Before making any significant changes, you need to make sure you have a good backup.