The hierarchical data model was developed in the _____.
A) 1960s
B) 1970s
C) 1980s
D) 1990s
Correct Answer:
Verified
Q30: In the _ model, the user perceives
Q31: The object-oriented data model was developed in
Q32: VMS/VSAM is an example of the _.
A)
Q33: In the _ model, each parent can
Q34: A(n) _ is the equivalent of a
Q36: A(n) _ represents a particular type of
Q37: A noun in a business rule translates
Q38: A(n) _ is a restriction placed on
Q39: A(n) _ is anything about which data
Q40: A(n) _ is bidirectional.
A) attribute
B) entity
C) relationship
D)
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