In E-R modeling,entities within an entity class may have different attributes.
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Q13: An entity class is described by the
Q14: A compound identifier is an identifier consisting
Q15: E-R modeling recognizes both relationship classes and
Q16: A composite identifier is defined as a
Q17: An identifier of an entity instance must
Q19: An entity instance is an occurrence of
Q20: Relationships of degree two are referred to
Q21: An ID-dependent entity is an entity whose
Q22: In a 1:N relationship,the term parent refers
Q23: An entity's minimum cardinality in a relationship
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