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

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

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Introduction to Database System
The activity of a file

is a measure of the percentage of existing records updated during a run
refers to how closely the files fits into the allocated
None of these
if high, reduces processing efficiency for sequential and nonsequential files
is a low percentages of number of records added or deleted from a file

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