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Bitmaps can be used as a compressed storage mechanism at the leaf nodes of ________ for those values that occur very frequently.

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Bitmaps can be used as a compressed storage mechanism at the leaf nodes of ________ for those values that occur very frequently.

(a) B-trees

(b) B+-trees

(c) Bit trees

(d) Both B-trees and B+-trees

I have been asked this question in a job interview.

My question is taken from Bitmap Indices in division Indexing and Hashing of Database Management

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The correct choice is (b) B+-trees

The explanation is: Bitmaps are combined and stored in a B+ tree.

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