Introduction to Database System
The DBMS acts as an interface between what two components of an enterprise-class database system?

The user and the database application
Data and the database
Database application and the database
Database application and SQL

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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
is a low percentages of number of records added or deleted from a file
if high, reduces processing efficiency for sequential and nonsequential files
None of these

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