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1.Imposing a foreign key constraint on the column of a table prevents that column from having...

1.Imposing a foreign key constraint on the column of a table prevents that column from having null values; thus, the NOT NULL constraint does not have to be added for that column to assure it is not null.

True

False

2.

A condition is part of a CHECK constraint. A condition consists of which universal computing pattern?

a.

expression - logical operator - expression
b.

condition - comparison operator - condition
c.

expression - comparison operator - expression

3.

You can use ALTER TABLE to enable and disable constraints, which is sometimes needed for moving records from one data store to another.

True

False

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Answer #1 
1.
False

2.
condition - comparison operator - condition

3.
True

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