Asynchronous Communication (Non Blocking Call) 1. Time Delay 2. Work from home 3. Youtube video's comment section 4.When computation takes long time; Flipkart page open but processing takes time 5. Scalability of application ; It doesn't wait for notification from another user placing order 6. Avoid Cascading failure ; At times if with response server becomes overload ,it is made asynchronous inorder to let server work on it.
Abstraction Hiding => Implementation Showing => Features On ATM Screen , Users see only option , here user doesn't know internal process. Example : ATM Screen Withdraw Balance Check
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