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Search algorithms that use an index are referred to as _________

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Search algorithms that use an index are referred to as _________

(a) Index scans

(b) Search scans

(c) Primary scans

(d) Equality scans

I have been asked this question in final exam.

The above asked question is from Query Processing in section Query Processing and Optimization of RDBMS

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Best answer
The correct choice is (a) Index scans

Easiest explanation: Search algorithms that use an index are called as index scans. We use the selection predicate to guide us through the choice of index to use in processing the query.

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