What is the difference between synchronous & asynchronous task in ios?


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how push notification works?

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What is App Bundle in iOS operating system?

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Explain app's state transitions when it gets launched?

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What is encapsulation in ios?

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What is the difference between viewdidload and viewwillappear?

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. Why an app on iOS device behaves differently when running in foreground than in background? 

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Explain How to access document directory

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What is view object in ios?

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Explain mutable and immutable types in objective c programming language?

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