Bitmap indexes tend to use less space than a _____ because they use bits instead of bytes to store their data.
A) hash index
B) sparse index
C) B-tree index
D) reverse index

Question

Quizplus · Accepted Answer

Bitmap indexes store only the presence or absence of a particular value, reducing the space required to store the index. This feature makes them more space-efficient than B-tree indexes, which store data in a hierarchical structure of index nodes. Hash indexes and reverse indexes do not necessarily store data in bytes or bits, and sparse indexes are used for optimizing queries with low selectivity, rather than space efficiency.

Bitmap Indexes Tend to Use Less Space Than a _____