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Database Normalization Quiz

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Questions and Answers

Which of the following is true about normalization theory?

Normalization theory is a process that only applies to unnormalized relations.

Normalization theory is a single-step process beginning with a normalized relation.

Normalization theory is based on the observation that relations with certain properties are more effective in inserting, updating, and deleting data. (correct)

Normalization theory is based on the observation that relations with certain properties are less effective in inserting, updating, and deleting data.

Which normal form requires that there is no transitive dependency between nonkey attributes?

First Normal Form (1NF)

Boyce-Codd Normal Form (BCNF)

Third Normal Form (3NF) (correct)

Second Normal Form (2NF)

Which normal form requires that all determinants are candidate keys?

First Normal Form (1NF)

Second Normal Form (2NF)

Boyce-Codd Normal Form (BCNF) (correct)

Third Normal Form (3NF)

Which normal form allows for a functional dependency of nonkey attributes on the primary key and atomic values only?

<p>First Normal Form (1NF)</p> Signup and view all the answers

What are functional dependencies used for in relational designs?

<p>To define normal forms for relations</p> Signup and view all the answers

Study Notes

Normalization Theory

Normalization theory aims to minimize data redundancy and dependency in relational databases.

Normal Forms

First Normal Form (1NF): All attributes must be atomic (cannot be divided further).
Second Normal Form (2NF): No transitive dependency between non-key attributes (no indirect dependencies).
Third Normal Form (3NF): All determinants are candidate keys (no transitive dependencies).
Boyce-Codd Normal Form (BCNF): Allows functional dependency of non-key attributes on the primary key and atomic values only.

Functional Dependencies

Functional dependencies are used in relational designs to establish relationships between attributes.
They are essential in normalization to minimize data redundancy and improve data integrity.

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Description

Test your knowledge on database normalization with this quiz! Learn about the different normal forms, including first normal form (1NF), second normal form (2NF), and third normal form (3NF). Assess your understanding of the principles and benefits of normalization theory.