Question

Why is data extraction for a data warehouse an ongoing function carried out at very frequent intervals?

a.

To reduce data extraction complexity

b.

To ensure a one-time event for data loading

c.

To accommodate changes in source systems

d.

To eliminate the need for data transformation

Posted under Data Warehousing and OLAP

Answer: (c).To accommodate changes in source systems Explanation:Data extraction for a data warehouse is an ongoing function to accommodate changes in source systems and ensure data is up-to-date.

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Q. Why is data extraction for a data warehouse an ongoing function carried out at very frequent intervals?

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