Consider the buffer replacement policies: 'Most Recently Used' and 'First in First Out': i. Construct an example (sequence of read or write requests) that, for the same query set, the 'First in First Out’ buffer replacement policy performs the worst with one buffer size and performs the best with another buffer size. Justify your answer and explain why if it does not exist.

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A: Find Your Answer Below

Q: pigdddd

A: as You are not given ques:

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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.