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Business Intelligence (BI) systems do not obtain their data by which of the following means?

  • A.Read and process data from an operational database
  • B.Process transactions
  • C.Process extracts from operational databases
  • D.Process data purchased from data vendors

Answer: B

Correct answer: Process transactions

BI systems obtain data by reading an operational database directly, by processing extracts taken from one, or by processing data bought from a vendor. What they do not do is process transactions themselves - that is the operational system’s job, and keeping the two apart is what protects transaction performance from analytical load.

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