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Question 1

Which SQL statement is used to create a new table?

Options :

A : UPDATE

B :

INSERT INTO

C :

DELETE FROM

D :

CREATE TABLE

Answer: D

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

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 4

Why is it important to normalize entity relationships in a physical data model?

Options :

A :

To improve data query performance

B :

To eliminate data redundancy

C :

To define primary and foreign key constraints

D :

To enforce data type specifications

Answer: B

Question 5

What is a foreign key in a relational database?

Options :

A :

A primary key from another table

B :

A key used to establish relationships between tables

C :

A key that can have duplicate values

D :

A constraint that ensures data integrity

Answer: B