Discussion
A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.
Answer: A
Correct answer: True
This is the definition of atomicity. The set of updates either all take effect or none does, so the database moves from one consistent state to another and is never left part way - the transfer that debits one account and fails to credit the other being the standard illustration.
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