📝 Question
#1564
____ means that the data used during the execution of a transaction cannot be used by a second transaction until the first one is completed.
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Correct Answer
A. Consistency
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Explanation
Even though multiple transactions may execute concurrently, the system guarantees that, for every pair of transactions Ti and Tj, it appears to Ti that either Tj finished execution before Ti started or Tj started execution after Ti finished.
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