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Self-checking digits would detect erroneous part numbers, but would not ensure that the data transfer is complete.
Field-level edit controls that test each field for alphanumerical integrity are input controls, but they would not ensure that the data transfer is complete.
Batch control totals, including control totals with hash controls would be most effective in ensuring that data uploaded from personal computers to the mainframe are complete and that no additional data are added. These controls would provide the best information on the completion of the data transfer.
Passwords are effective in limiting unauthorized personnel, but would not ensure that the data transfer is complete.