What is GCD in iOS?

1.	What is GCD in iOS?
Answer» What is GCD in iOS? GCD basically stands for GRAND Central Dispatch. GCD is a low-level API which allows us for manage multiple concurrent operations. GCD will assist us to increase the responsiveness of our app by deferring COMPUTATIONALLY INTENSIVE tasks to the CONTEXT. It a simpler concurrency model than locks and THREADS to deal with.

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