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Which of the following timestamps is used to record the time when a transaction has finished its read phase?

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Which of the following timestamps is used to record the time when a transaction has finished its read phase?

(a) Start(i)

(b) Validation(i)

(c) Finish(i)

(d) Write(i)

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I'm obligated to ask this question of Validation Based Protocols in portion Concurrency Control of RDBMS

1 Answer

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Right option is (b) Validation(i)

Easy explanation: There are three different timestamps for each transaction start(i), validation(i), finish(i). The validation phase is used to record the time at which a transaction has finished its read phase and has started its validation phase.

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