Multiple choice Which one of the following is not a data security measure? Using password to access Using retention periods for all files Allowing only EDP personnel to access any file None of these Reveal answer Fill a bubble to check yourself D Correct answer Explanation The options A, B, and C are all standard data security practices. Since all listed options are valid security measures, 'None of these' is the correct choice as it implies none of the options are 'not' a security measure.