An identifier of an entity instance must consist of one and only one attribute.
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Q12: Entities can be associated with one another
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
Q18: In E-R modeling,entities within an entity class
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
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