Which of three schemas used in three-schema model is a complete logical view of database?
a) external
b) internal
c) implementation
d) conceptual
Which of three schemas used in three-schema model shows physical storage using a particular product or technique?
a) external
b) internal
c) implementation
d) conceptual
The converting of one model into another model is called……
a) mapping
b) schema
c) database
How many levels of mapping?
a) one
b) two
c) three
d) four
Explanation: internal mapping, external mapping
The mapping that defines the corresponding between the conceptual view and stored database……
a) internal mapping
b) external mapping
c) conceptual mapping
d) none of these
The mapping that defines the corresponding between the external view and conceptual view…..
a) internal mapping
b) external mapping
c) conceptual mapping
d) none of these
