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An update log record describes a ________ database write(a) Single(b) Double(c) Triple(d) QuadrupleI got this question during an interview.The origin of the question is Recovery and Atomicity in section Recovery System of RDBMS |
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Answer» RIGHT answer is (a) SINGLE Best explanation: An update log record describes a single database WRITE. It has four fields in it which are, transaction identifier, data-item identifier, old VALUE, NEW value. |
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