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Introduction to Database System

Introduction to Database System
Data security threats include

all of the listed here
fraudulent manipulation of data
hardware failure
privacy invasion

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

foreign keys.
composite keys.
determinants.
candidate keys.

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Introduction to Database System
Enterprise Resource Planning (ERP) is an example of a single user database.

False
True

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Introduction to Database System
An-owner-member set in the CODASYL specifications may have

only one owner but many owner occurrences
more than one member but only one occurrence per member
All of the listed here
only one member but many member occurrence

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Introduction to Database System
In a database, data is stored in spreadsheets which have rows and columns.

False
True

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Introduction to Database System
Which type of entity is related to two or more associated entities that each contain specialized attributes that apply to some but not all of the instances of the entity?

Instance entity
Archetype entity
Subtype entity
Supertype entity

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