What conceptual model is being used if an entity-relationship diagram (ERD) is being used?

Question

The choices are:

a. the internal model

b. the physical model

c. the external model

d. the conceptual model

Answer 1

d. the conceptual model

In the context of an entity-relationship diagram (ERD), the ERD represents the conceptual model. The conceptual model is a representation of the high-level organizational structure of data in a system, abstracted from specific implementation details. It focuses on defining entities, their attributes, and the relationships between entities. ERDs are commonly used in database design to visualize and communicate the structure of a database at a conceptual level before moving on to physical implementation details.