Introduction to Database System
Which of the following hardware components is the most important to the operation of a database management system?

plotter
high-resolution video display
printer
high speed, large-capacity disk

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Introduction to Database System
In a large DBMS

each user can access every sub¬schema
all of the listed here
each subschema contains every field in the logical schema
each user can "see" only a small part of the entire database

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