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Introduction to Database System

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

database
data bank
data record
data file

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Introduction to Database System
The Management Information system (MIS) structure with one main computer system is called a

hierarchical MIS structure
distributed MIS structure
decentralized MIS structure
centralized MIS structure

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Introduction to Database System
The primary key is selected from the:

candidate keys.
composite keys.
determinants.
foreign keys.

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Introduction to Database System
In any hierarchy of data organization, the smallest entity to be processed as a single unit is called

data field
database
data record
None of these
data file

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Introduction to Database System
Data security threats include

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

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Introduction to Database System
Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity?

Weak entity
ID-independent entity
ID-dependent entity
Strong entity

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