What is the difference between synchronous & asynchronous task in ios?
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how push notification works?
Is core data is thread safe?
What is the meaning of 'weak' keyword?
Explain parent-child context setup. How does it work?
What is App Bundle in iOS operating system?
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Explain app's state transitions when it gets launched?
What is encapsulation in ios?
What is the difference between viewdidload and viewwillappear?
. Why an app on iOS device behaves differently when running in foreground than in background?
Explain How to access document directory
What is view object in ios?
Explain mutable and immutable types in objective c programming language?