When constructing an ERD from a problem narrative:
A) You can derive relationships but not cardinalities from the narrative
B) You can derive cardinalities but not relationships from the narrative
C) You can usually derive both relationships and cardinalities from the narrative, but sometimes they are incomplete
D) None of the above

Question

Quizplus · Accepted Answer

Usually, a problem narrative includes the identification of entities and their relationships, as well as the cardinalities of those relationships (e.g., "each customer places many orders, but each order belongs to only one customer"). However, sometimes the narrative may not provide the full information, and more clarification is needed.

When Constructing an ERD from a Problem Narrative