Which of the following is not one of the three schemas used in
ANSI?
a) external
b) internal
c) implementation
d) conceptual
What does DBTG stand for?
a) database transfer group
b) database task group
c) database type group
d) database tier group
Which of the following year database system was developed?
a) 1970
b) 1971
c) 1972
d) 1973
When did ANSI published database architecture vocabulary?
a) 1970
b) 1971
c) 1975
d) 1973
How many layers are in three-level architecture?
a) one
b) two
c) three
d) four
Explanation: external level, conceptual level, physical level
Which of three schemas used in three-schema model represents how user view database?
a) external
b) internal
c) implementation
d) conceptual
