Question: What is a data model? What is a high-level conceptual data model? What is an entity? An attribute? A relationship? List and briefly describe the

What is a data model?

What is a high-level conceptual data model?

What is an entity? An attribute? A relationship?

List and briefly describe the common record-based logical data models.

Describe the purpose of a conceptual design.

How is a conceptual design different from a logical design?

What is an external model?

What is a conceptual model?

What is an internal model?

What is a physical model?

Which model does the database administrator work with?

Which model does the end user work with?

What is logical data independence?

What is physical data independence?

Provide three examples of the most popular relational databases used.

What is the difference between centralized and distributed database systems?

What is the difference between homogenous distributed database systems and heterogeneous distributed database systems?

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