just answer true/false , fast pls -a]Weak entity is an entity that borrow all of its primary from another entity types. -b]You are not allowed to have identical attributes name in different entities. -c]An operational database is sometimes referred to as an enterprise database.

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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.