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Question 1

Which of the following is NOT typically included in a physical data model?

Options :

A :

Data type specifications for attributes

B :

Tables and columns

C :

Entity-relationship diagrams

D :

Primary and foreign key constraints

Answer: C

Question 2

What is the purpose of denormalization in a physical model?

Options :

A :

To establish primary and foreign key relationships

B :

To enforce data integrity

C :

To improve data retrieval performance

D :

To eliminate all redundancy in the database

Answer: C

Question 3

What is the difference between a logical model and a physical model in database design?

Options :

A :

A logical model is created by developers, while a physical model is created by database administrators.

B :

A logical model focuses on performance optimization, while a physical model focuses on data integrity.

C :

A logical model represents the database structure in terms of entities and relationships, while a physical model represents the actual implementation of the database.

D :

A logical model is used for small-scale databases, while a physical model is used for large-scale databases.

Answer: C

Question 4

What is a database?

Options :

A :

A programming language used to manipulate data

B :

A set of tables used for data storage

C :

A collection of data organized in a structured manner

D :

A collection of files stored on a computer

Answer: C

Question 5

What is the purpose of defining physical storage structures when mapping a physical model?

Options :

A :

To establish primary and foreign key constraints

B :

To determine the data types for each column

C :

To define relationships between tables

D :

To optimize database access and storage

Answer: D