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Question

How does data clustering improve query performance in a data warehouse?

a.

By eliminating the need for indexing

b.

By accelerating the loading of large tables

c.

By fostering sequential prefetch of related data

d.

By simplifying the process of regular purging

Answer: (c).By fostering sequential prefetch of related data Explanation:Data clustering improves query performance in a data warehouse by fostering sequential prefetch of related data.

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Q. How does data clustering improve query performance in a data warehouse?