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In query processing, the ___________ is the lowest-level operator to access data.

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In query processing, the ___________ is the lowest-level operator to access data.

(a) Index Search

(b) Linear search

(c) File scan

(d) Access paths

I have been asked this question at a job interview.

Question is from Selection Operation topic in division Query Processing Techniques of Database Management

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Best answer
Right choice is (c) File scan

Explanation: File scans are search algorithms that locate and retrieve records that fulfill a selection condition.

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