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What's difference between "Optimistic" and "Pessimistic" locking?
In the pessimistic locking when user wants to update a data it locks the record and till then no one can update data. The Other user's can only view the data when there is a pessimistic locking.
In the optimistic locking many users can open the same record for updating,and hence increases maximum concurrency. The Record is only locked when updating the record. This is the most preferred way of locking practically. In today's time the browser based application is very common and having the pessimistic locking is not a practical solution.
How many types of diagrams are there in UML? There are nine types of diagrams in the UML as shown below:- 1)Use case diagram: The use case diagram describe "WHAT" of a
Question: (a) List and describe the four parameters contained in the second section of the AdRotator Scheduler File. (b) Distinguish between the following types of "Locks"
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