what is preferences

1197

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What is the APK format in Android?

554

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Who calls the main function of you app during the app launch cycle in iOS operating system?

524

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What is App Bundle in iOS operating system?

501

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What are all the difference between categories and subclasses in iOS operating system?

423

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What is an NSOperationQueue and how/would you use it in iOS operating system?

448

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What is plist file and explain about it is usage in iOS operating system?

465

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Multitasking support is available from which version in iOS operating system?

501

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Which app specific objects store the app's content in iOS operating system?

439

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How can we achieve singleton pattern in iOS?

481

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What is Delegation in iOS?

463

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Why do we need to use @Synthesize in iOS operating system?

443

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Is the delegate for a CAAnimation retained in iOS operating system?

464

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How to represent layer objects in iOS operating system ?

453

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What is the difference between copies & retain in iOS operating system?

463

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