An object identifier is one or more attributes that the users employ to identify object instances.
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Q10: Whether a developer uses an E-R model
Q11: Group attributes are composites of other attributes.
Q12: Semantic objects are grouped into _.
A)composites
B)entities
C)objects
D)classes
Q13: What type of attribute has a single
Q14: A subtype inherits all the attributes of
Q16: Object identifiers may or may not be
Q17: Semantic objects represent distinct identities.
Q18: The cardinalities of an attribute operate only
Q19: A "simple object" can contain only simple
Q20: The first attribute of a subtype object
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