Question

Which type of indexing can be very effective in a data warehouse environment when indexing on fields with a smaller number of distinct values?

a.

B-tree indexing

b.

Hash indexing

c.

Bit-mapped indexing

d.

Clustered indexing

Posted under Data Warehousing and OLAP

Answer: (c).Bit-mapped indexing Explanation:Bit-mapped indexing can be effective in indexing fields with a smaller number of distinct values, such as geographic regions in a data warehouse.

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Q. Which type of indexing can be very effective in a data warehouse environment when indexing on fields with a smaller number of distinct values?

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