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CS315x - CS471 Advanced Database Systems
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The lock manager uses a lock table to record:
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Lock and unlock operations must be:
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The read_lock(X) pseudo-code increments:
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Lock(X) in the example means:
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What is the primary goal of concurrency control in a DBMS?
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Which transaction state records when all effects are permanent?
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Which operation reduces columns and removes duplicates?
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A cascadeless schedule ensures:
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A recoverable schedule requires that a transaction T that read a value written by U:
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Cascading rollback occurs when:
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