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Question

What is Bitmapped Indexing effective for in a data warehouse?

a.

High-selectivity data

b.

Text-based data

c.

Low-selectivity data

d.

Numeric data

Posted under Data Warehousing and OLAP

Answer: (c).Low-selectivity data Explanation:Bitmapped Indexing is effective in a data warehouse for low-selectivity data, which refers to attributes with only a few distinct values.

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