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Introduction to Database System

Introduction to Database System
The XML family of standards is very important in database processing today.

True
False

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Introduction to Database System
The following are components of a database except ________ .

indexes
metadata
reports
user data

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Introduction to Database System
The highest level in the hierarchy of data organization is called

database
data record
data file
data bank

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Introduction to Database System
Data encryption techniques are particularly useful for

improving data integrity
protecting data in data communication systems
All of these
reducing storage space requirements
None of these

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Introduction to Database System
Two files may be joined into a third file if

they have a row in common
both (b) and (c)
they have no records with the same value in the common field
they have a field in common
None of these

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Introduction to Database System
In the relational model, relationships between relations or tables are created by using:

composite keys.
determinants.
foreign keys.
candidate keys.

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