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Which of the following transactions can multiversion two phase locking protocol not differentiate.

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Which of the following transactions can multiversion two phase locking protocol not differentiate.

(a) Read only transactions

(b) Update transactions

(c) All of the mentioned

(d) Double operator transactions

I had been asked this question in an international level competition.

My doubt is from Multiversion Schemes, Snapshot Isolation in division Concurrency Control of RDBMS

1 Answer

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Best answer
Correct answer is (d) Double operator transactions

Best explanation: The multiversion two phase locking protocol cannot differentiate double operator transactions but it can differentiate between read only transactions and update transactions.

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