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Data Warehousing

Data Warehousing
Derived data are detailed, current data intended to be the single, authoritative source for all decision support applications.

True
False

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Data Warehousing
Star schema is suited to online transaction processing, and therefore is generally used in operational systems, operational data stores, or an EDW.

True
False

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Data Warehousing
Data in the data warehouse are loaded and refreshed from operational systems.

False
True

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Data Warehousing
The generic two-level data warehouse architecture includes which of the following?

At least one data mart
Data that can extracted from numerous internal and external sources
All of these
Near real-time updates

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Data Warehousing
Static extract is used for ongoing warehouse maintenance.

False
True

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Data Warehousing
Data scrubbing can help upgrade data quality; it is not a long-term solution to the data quality problem.

True
False

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