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      Question

      In two-phase locking, a transaction releases its

      locks:
      A Anytime after reading Correct Answer Incorrect Answer
      B Only after acquiring all locks and entering shrinking phase Correct Answer Incorrect Answer
      C Immediately after write Correct Answer Incorrect Answer
      D When system is idle Correct Answer Incorrect Answer
      E Randomly Correct Answer Incorrect Answer

      Solution

      Two-phase locking enforces a growing phase (acquire) and shrinking phase (release) for serializability.

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