DBMS-Enhanced Entity-Relationship (EER) Model Questions and Answers

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Q21
A subtype is not an entity on its own.
  • A TRUE
  • B FALSE
Answer: Option A
Q22
A subtype cannot have its own subtypes
  • A TRUE
  • B FALSE
Answer: Option A
Q23
The U-shaped symbols on each line connecting subtype to the circle, indicates that that the subtype is a
  • A subset of the supertype
  • B direction of supertype/subtype relationship
  • C both o these
  • D none of these
Answer: Option A
Q24
The uses of specialisation or generalisation technique for a particular situation depends on
  • A the nature of the problem
  • B the nature of the entities and relationships.
  • C the personal preferences of the database designer.
  • D all of these.
Answer: Option D
Q25
In specialisation, the differences between members of an entity is
  • A maximized
  • B minimized
  • C both of these
  • D none of these
Answer: Option A
Q26
In generalisation, the differences between members of an entity is
  • A maximized
  • B minimized
  • C both of these
  • D none of these
Answer: Option B
Q27
Specialisation is a
  • A top-down process of defining superclasses and their related subclasses
  • B bottom-up process of defining superclasses and their related subclasses
  • C both of these
  • D none of these.
Answer: Option A
Q28
EER stands for
  • A extended E-R
  • B effective E-R
  • C expanded E-R
  • D enhanced E-R
Answer: Option D
Q29
Database design is a process of arrranging the data fields into an organised structure needed by one or more applications.
  • A TRUE
  • B FALSE
Answer: Option A
Q30
Frequent software changes, without change in specifications, is an indication of a good design
  • A TRUE
  • B FALSE
Answer: Option B

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