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What is the primary reason to keep raw source data after loading?

  1. A Transformations can be corrected and re-run without re-extracting from source
  2. B It satisfies backup requirements
  3. C It improves query speed
  4. D It reduces storage cost
Answer

Transformations can be corrected and re-run without re-extracting from source

Business definitions change over time, and retaining raw data means history can be recomputed under the new definition.

All Data Warehousing MCQs

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