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Introduction to Database System

Introduction to Database System
A file that is organized in uniform format is formally referred to as a _____ or a database file.

Database
None of these
Structured data file
Document
Record

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Introduction to Database System
Given the functional dependency R → S , R is called the determinant.

False
True

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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)
None of these
they have no records with the same value in the common field
they have a field in common

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Introduction to Database System
If you want to organize a file in multiple ways, it is better to _____ the data rather than to sort it.

Index
Update
Sort Key
None of these
Delete

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Introduction to Database System
Which of the following is a group of one or more attributes that uniquely identifies a row?

Tuple
Relation
Key
Determinant

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Introduction to Database System
Which of the following is not a logical data-base structure?

network
chain
tree
relational

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