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State true or false: Snapshot isolation has low overhead

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State true or false: Snapshot isolation has low overhead

(a) True

(b) False

This question was addressed to me in a national level competition.

My question is based upon Multiversion Schemes, Snapshot Isolation in portion Concurrency Control of RDBMS
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Best answer
Correct answer is (a) True

The best explanation: Snapshot isolation is attractive in practice because it has a relatively very low overhead.
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