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Relational Databases

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Questions and Answers

Which of the following is a step in building a database for an application?

Define the functional dependencies.

Translate the ERD to a database schema.

Understand the real-world domain being captured. (correct)

Normalize the relations.

Which concept is used in normalization to group attributes into relations?

Functional dependency (correct)

Normalization form

Database schema

Entity-relationship diagram

What is the purpose of normalization?

To group attributes into relations.

To define the functional dependencies.

To eliminate data redundancy and improve data integrity. (correct)

To understand the real-world domain being captured.

What are the most commonly used normal forms in normalization?

First Normal Form (1NF), Second Normal Form (2NF), and Third Normal Form (3NF) Signup and view all the answers

How does normalization use functional dependencies?

To group attributes into relations. Signup and view all the answers

Which of the following is NOT a step in building a database for an application?

Normalize the database Signup and view all the answers

What is the purpose of functional dependency in normalization?

To group attributes into relations Signup and view all the answers

Which normal form ensures that there are no repeating groups in a relation?

First Normal Form (1NF) Signup and view all the answers

What are the characteristics of functional dependencies used in normalization?

No repeating groups in a relation Signup and view all the answers

How does normalization use functional dependencies to group attributes into relations?

By identifying dependencies between attributes Signup and view all the answers