Functional Dependency and Normalization

Functional Dependency and Normalization

University

20 Qs

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Functional Dependency and Normalization

Functional Dependency and Normalization

Assessment

Quiz

Computers

University

Practice Problem

Medium

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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a functional dependency in the context of relational databases?

It describes the relationship between two tables

It describes the relationship between two or more attributes within a table

It describes the relationship between primary and foreign keys

It describes the relationship between two databases

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a functional dependency A → B, what does A represent?

Primary Key

Determinant

Foreign Key

Attribute

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following statements is true about functional dependencies?

A functional dependency always holds true for every instance of a relation

A functional dependency may not hold true for every instance of a relation

Functional dependencies are only applicable to primary keys

Functional dependencies are static and cannot change

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a functional dependency A → B, if two tuples have the same value for A, what can you infer about their values for B?

They must have different values for B

They must have the same value for B

There's no constraint on their values for B

B must be a composite attribute

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a superkey in the context of functional dependencies?

A key that uniquely identifies each tuple in a relation

A key that is a subset of another key

A key that cannot be determined by any other attribute

A key that uniquely identifies a functional dependency

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of normalization with respect to functional dependencies?

To optimize database storage

To eliminate redundancy and anomalies

To speed up query execution

To enforce referential integrity

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the difference between a candidate key and a primary key in the context of functional dependencies?

A candidate key can have multiple values, while a primary key must have a unique value

A candidate key uniquely identifies each tuple, while a primary key is chosen from the candidate keys

A candidate key can be composed of multiple attributes, while a primary key must be a single attribute

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