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Hi , i got one interview question as ' Suppose 6 users are requesting for a save functionality .. how do u avoid the concurrency Please help me on this

Jaish Mathews · Answer

OK. The problem Ref. to Database transaction operations. Also it's not avoid concurrency, but handle concurrency during transaction. This URL will help to get an idea https://www.youtube.com/watch?v=TWv2jpmxaf8

Amit Mohanty · Answer

Hii Lakshmi, To avoid concurrency you can use Asynchronous Programming. Modern asynchronous .NET applications use two keywords: async and await. The async keyword is added to a method declaration, and its primary purpose is to enable the await keyword within that method (the keywords were introduced as a pair for backward-compatibility reasons). An async method should return Task if it returns a value, or Task if it does not return a value. These task types represent futures; they notify the calling code when the async method completes. async Task DoSomethingAsync() { int val = 13; // Asynchronously wait 1 second. await Task.Delay(TimeSpan.FromSeconds(1)); val *= 2; // Asynchronously wait 1 second. await Task.Delay(TimeSpan.FromSeconds(1)); Trace.WriteLine(val); } An async method begins executing synchronously, just like any other method. Within an async method, the await keyword performs an asynchronous wait on its argument. First, it checks whether the operation is already complete; if it is, it continues executing (synchronously). Otherwise, it will pause the async method and return an incomplete task. When that operation completes some time later, the async method will resume executing. For more details refers to https://www.oreilly.com/library/view/concurrency-in-c/9781491906675/ch01.html

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