uestion10: The following is not a property of transactions: (a) Permanent: once committed, the results of a transaction are made permanent. (b) Serializable: the result of concurrent transactions must be the same as if they were run in serial order. (c) Indivisible: the transaction appears as an indivisible action. (d) Bounded: a transaction must have an upper bound on the time it takes to complete

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Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.