Logical data independence is the ability to change ______ schema without…
2017
Logical data independence is the ability to change ______ schema without having to change ______ schema.
- A.
internal; external
- B.
conceptual; internal
- C.
conceptual; external
- D.
internal; conceptual
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Correct answer: C
Logical data independence is the capacity to change the conceptual schema without affecting the external schema (view level). It isolates user applications from structural modifications made at the logical level.
Therefore, the correct choice is conceptual; external. Correct option is C.