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Which of the following is the most expensive method?

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+1 vote
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in RDBMS by (118k points)
Which of the following is the most expensive method?

(a) Timestamping

(b) Plain locking

(c) Predicate locking

(d) Snapshot isolation

I have been asked this question during an online interview.

My doubt stems from Serializability topic in section Transactions of RDBMS

1 Answer

+1 vote
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Best answer
The correct option is (c) Predicate locking

For explanation: Predicate locking is the most expensive method and is generally not used in most databases.

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