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The three-schema components include all, but:

  • A.internal schema.
  • B.conceptual schema.
  • C.programming schema.
  • D.external schema.

Answer: C

Correct answer: programming schema.

The three-schema architecture has an internal schema describing physical storage, a conceptual schema describing the whole logical structure, and external schemas describing each user group’s view. There is no programming schema; the point of the architecture is precisely to insulate programs from the other two levels.

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