Which are the ways of achieving concurrency in ios?
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What is synchronous vs. Asynchronous in gcd ?
Explain how the push notification works in iOS operating system?
Is a delegate retained?
How are non-atomic and atomic properties different? Which one is the default property for synthesized properties? When would a user operate one over the other?
What is difference between unit tests and ui test in xcode?
Why do all model object attributes get marked with @dynamic and not synthesised?
Where do you test the developed apps if you do not have the device?
what are the controllers are available in objective C
What is nspersistentstore? Is it thread safe?
What is framework in ios?
Which is the state an app reaches briefly on its way to being suspended?
What’s the difference between mkannotation and mkpointannotation?