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An actual update is not allowed to a data item ____________

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An actual update is not allowed to a data item ____________

(a) before the corresponding log record is written out to stable storage

(b) after the corresponding log record is written out to stable storage

(c) until the whole log record has been checked for inconsistencies

(d) all of the mentioned

The question was asked during a job interview.

Asked question is from Atomic Transactions topic in division Process Synchronization of Operating System

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Correct choice is (a) before the corresponding log record is written out to stable storage

The explanation: None.

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