Physical Database Design
The blocking factor is:

a group of fields stored in adjacent memory.
attributes grouped together by the same secondary key.
attributes grouped together by the same primary key.
the number of physical records per page.

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Physical Database Design
Which of the following are integrity controls that a DBMS may support?

Limit the use of null values in some fields.
Assume a default value in a field unless a user enters a value for that field.
All of these
Limit the set of permissible values that a field may assume.

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