Introduction to Database System
The different classes of relations created by the technique for preventing modification anomalies are called:

None of these
referential integrity constraints.
functional dependencies.
normal forms.

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Introduction to Database System
With respect to data input, the most accurate description of batch control is

dividing documents to be entered into batches
controlling the input of each input clerk
None of these
comparing to a pre-calculated figure the total of a data item summed across a batch records put into the system
All of these

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