What is Concurrency and its types
| When two or more people try to update same type of data then Concurrency helps how to handle this situation there are two types of concurrency
Pessimistic:-When one user try to change the data with pessimistic concurrency a lock is placed on the data so that another user cannot change that one after one another can change. Optimistic:-In this if two user works on the same data and one change that data first then second user cannot change |
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| that same data becasue the which he have using is allready changed so he cannot do the change becasue change apply to another data that is changed by first user. | |