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Introduction to Database System

Introduction to Database System
A relation is considered a:

three-dimensional table.
one-dimensional table.
two-dimensional table.
Column.

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Introduction to Database System
Which of the following is not characteristic of a relational database model?

tables
complex logical relationships
records
treelike structure

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Introduction to Database System
An ID-dependent entity is an entity whose identifier is a composite identifier where no portion of the composite identifier is an identifier of another entity.

True
False

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Introduction to Database System
The index consists of

None of these
pointers to the master list
both (a) and (b)
All of these
a list of keys

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Introduction to Database System
A data dictionary doesn't provide information about:

It will be the dominant data base of the future
the size of the disk storage device
It is conceptually simple
It allows a many-to-many relationship
where data is located

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Introduction to Database System
A subtype entity is a special case of another entity called a supertype entity.

True
False

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