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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 4I got this question in a job interview.I need to ask this question from System Modelling topic in chapter Software Modelling of Software Engineering

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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