A transaction is a group of alternative database actions,from which the database can choose to perform only one of them.
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Q1: Locks placed automatically by the DBMS are
Q3: In general,the overall responsibility of the DBA
Q4: Explicit locks are locks that are placed
Q5: Database administration tasks have to be performed
Q6: Changes in the database structure usually involve
Q7: An exclusive lock locks the item from
Q8: Locks with large granularity are easy for
Q9: Locks placed by a command issued to
Q10: An exclusive lock locks the item from
Q11: Database administration is more important but less
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