$1.$ Discuss the importance of data models.

$2.$ What is a business rule, and what is its purpose in data modeling?

$3.$ Describe the basic features of the relational data model and discuss their importance to the end user and the designer.

$4.$ Explain how the entity relationship $($ER$)$ model helped produce a more structured relational database design environment.

$5.$ Describe the Big Data phenomenon.

$6.$ What does the term $3$ Vs refer to$?$