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Which of the following does not lock the entire index

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Which of the following does not lock the entire index

(a) Phantom locking

(b) Phantom problem

(c) Index locking

(d) Index problem

I had been asked this question in an online quiz.

I need to ask this question from Insert, Delete Operations and Predicate Reads in section Concurrency Control of RDBMS

1 Answer

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Best answer
Correct answer is (c) Index locking

Explanation: Index locking avoids locking the entire index. Any transaction that inserts a tuple into a relation must insert information into every index maintained on the relation.

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