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Which level of Entity Relationship Diagram (ERD) models all entities and relationships ?

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Which level of Entity Relationship Diagram (ERD) models all entities and relationships ?

(a) Level 1

(b) Level 2

(c) Level 3

(d) Level 4

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I need to ask this question from System Modelling topic in chapter Software Modelling of Software Engineering

1 Answer

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Best answer
The correct answer is (b) Level 2

For explanation: Level 1 ERD models all data objects (entities) and their “connections” to one another while Level 3 ERD models all entities, relationships, and the attributes that provide further depth. Thus option b is correct.

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