Data Model

What is a data model?

• A database software

• A storage device

• An organization of data elements and how they relate

• A type of network

Which of the following best describes a data model?

• A data entry form

• A graphical representation of a real-world situation

• A computer virus

• A hard drive map

Which level of data model is considered the highest?

• Logical

• Physical

• Conceptual

• Enterprise

Which data model level is concerned with DBMS implementation?

• Conceptual

• Logical

• Physical

• Organizational

What does the enterprise data model show?

• File names

• A graphical view of all organizational data

• Only employee data

• Software versions

In the hierarchical model, data is organized in what form?

• Ring

• Graph

• Tree

• Table

The conceptual data model does not include:

• Data types

• Relationships

• Entities

• Concepts

There are _________ approaches of data model.

• 3

• 5

• 4

• 6

_______ is one of the approaches in data model.

• Star Model

• Network Model

• Enterprise Model

• Schema Model

Which type of data model is displayed in this picture?

• Hierarchical model:  

• Network model

• Relational model

• Star Schema: