A company has recently upgraded its purchase system to incorporate EDI transmissions. Which of
the following controls should be implemented in the EDI interface to provide for efficient data
mapping?

A.
Key verification

B.
One-for-one checking

C.
Manual recalculations

D.
Functional acknowledgements

Explanation:

Acting as an audit trail for EDI transactions, functional acknowledgements are one of the main
controls used in data mapping. All the other choices are manual input controls, whereas data
mapping deals with automatic integration of data in the receiving company.