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Data Normalization and Relational Model Quiz

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Data Normalization and Relational Model Quiz

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Questions and Answers

Which of the following is NOT a goal of data normalization?

To avoid duplication of data

To validate and improve a logical design

To decompose relations with anomalies

To allow users to insert, delete, and update rows (correct)

What is the purpose of well-structured relations?

To minimize data redundancy

To avoid anomalies (correct)

To produce smaller relations

To allow users to insert, delete, and update rows

What is an insertion anomaly?

Adding new rows causes data inconsistencies

Deleting rows may cause a loss of data needed for other future rows

Adding new rows forces user to create duplicate data (correct)

Changing data in a row forces changes to other rows

What is a deletion anomaly?

Deleting rows may cause a loss of data needed for other future rows (A) Signup and view all the answers

What is a modification anomaly?

Changing data in a row forces changes to other rows (D) Signup and view all the answers

Data normalization is primarily a tool to validate and improve a logical design so that it satisfies certain constraints that avoid unnecessary duplication of ______.

data Signup and view all the answers

The process of decomposing relations with anomalies to produce smaller, ______ relations.

well-structured Signup and view all the answers

Data Normalization and Relational Model Quiz

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Podcast

Questions and Answers

Which of the following is NOT a goal of data normalization?

What is the purpose of well-structured relations?

What is an insertion anomaly?

What is a deletion anomaly?

What is a modification anomaly?

Data normalization is primarily a tool to validate and improve a logical design so that it satisfies certain constraints that avoid unnecessary duplication of ______.

The process of decomposing relations with anomalies to produce smaller, ______ relations.

A relation that contains minimal data redundancy and allows users to insert, delete, and update rows without causing ______ inconsistencies.

The goal of well-structured relations is to avoid ______.

Example – Figure 5.2b: Is this a ______?

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