Introduction to Database System
The activity of a file

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

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Introduction to Database System
A race condition occurs when

None of the listed here
two users of the DBMS are interacting with different files at the same time
Two concurrent activities interact to cause a processing error
Both of the listed here

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