Introduction to Database System
An audit trail

can be used to restore lost information
is the recorded history of operations performed on a file
is used to make back-up copies
All of the listed here

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Introduction to Database System
A multiple-form file management system

allow you to entry data in all the forms
lets you define different forms for different operations
None of these
both (a) and (b)
lets you create a look-up form with an associated read-only password to prevent access by unauthorized users

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