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Introduction to Database System

Introduction to Database System
A key is a group of one or more attributes that uniquely identifies a row.

True
False

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Introduction to Database System
The modify operation is likely to be done after

None of these
Delete
All of these
Look-up
Insert

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Introduction to Database System
A _____ database does not use pointers or physical links, but instead finds related records by examining the contents of fields.

Hierarchical
Network
None of these
Relational
Object-Oriented

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Introduction to Database System
In a relation, the rows are sometimes called "records".

False
True

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Introduction to Database System
If a piece of data is stored in two places in the database, then

changing the data is one spot will cause data inconsistency
both (a) and (b)
storage space is wasted
None of these
it can be more easily accessed

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Introduction to Database System
The files stored on a secondary stage device are composed of a hierarchy of data. What does a record in a file contain?

Data field
Characters
Bits
None of the listed here

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