What is the difference strong and weak reference?


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More Apple iOS Interview Questions

Explain the difference between cocoa and cocoa touch?

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What is iphone screen size?

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What is the use of double question marks (“??”) ?

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Is core data is thread safe?

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Explain what is storyboard?

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Explain the difference between NSOperationQueue concurrent and non-concurrent in iOS operating system?

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When an app is said to be in active state?

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What is ipa?

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. How do you change the content of your app in order to change the views displayed in the corresponding window?

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