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Question 1

When mapping the physical model, why is it important to consider data types?

Options :

A : Data types determine the available storage space for each attribute

B : Data types affect the efficiency of data retrieval operations

C : Data types determine the order of execution for database operations

D : Data types determine the relationships between tables

Answer: A

Question 2

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 3

Which of the following data modeling techniques allows for the creation of relationships between entities?

Options :

A :

Document modeling

B :

Hierarchical modeling

C :

Entity-Attribute-Value (EAV) modeling

D :

Relational modeling

Answer: D

Question 4

What purpose does mapping fulfill in a physical model?

Options :

A :

To specify the primary keys for each table

B :

To optimize the database for efficient querying

C :

To define the table structures and attributes

D :

To establish the relationships between tables

Answer: D

Question 5

In a physical data model, what are foreign keys used for?

Options :

A :

To represent the logical structure and properties of database objects.

B :

To improve performance by storing frequently accessed data together.

C :

To define the relationships and links between tables.

D :

To specify the attributes and data types for each table.

Answer: C