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Introduction to Database System

Introduction to Database System
Which of the following is not a relational database?

4th Dimension
FoxPro
Reflex
dBASE IV

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Introduction to Database System
The relational model uses some unfamiliar terminology. A tuple is equivalent to a

field
data base
record
data item

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Introduction to Database System
Given the functional dependency R → (S,T) , then it is also true that R → S.

True
False

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Introduction to Database System
1:1, 1:N and N:M relationships are also known as HAS-A relationships.

True
False

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Introduction to Database System
To have a file hold a list, it is necessary to

identify the name, width and type of the fields of each record.
decide which fields will be used as sort or index keys
identify the records in the list
All of the listed here

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Introduction to Database System
Applications are programs that interact directly with the database.

True
False

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