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

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

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Introduction to Database System
A good query system

can accept English language commands
allows non-programmers to access information stored in a database
can be accessed only by data processing professionals
None of these
both (a) and (b)

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