Introduction to Database System
The master list of an indexed file

both (b) and (c)
contains only a list of keys and record numbers
has a number assigned to each record
None of these
is sorted in ascending order

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Introduction to Database System
The activity of a file

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

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