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Modification schema of oracle database in one level without affecting the schema in high level is called as _______

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Modification schema of oracle database in one level without affecting the schema in high level is called as _______

(a) Data Migration

(b) Data Isolation

(c) Data Independence

(d) Data Abstraction

The question was asked in an internship interview.

Question is taken from Databases and Instances in chapter Oracle Database 11g Architecture Options of Oracle

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Correct choice is (c) Data Independence

Easiest explanation: Data Independence means changing internal level does not affect conceptual level.

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