Apple iOS Interview Questions
Questions Answers Views Company eMail

What is App Bundle in iOS operating system?

TryTechnicals Pvt Ltd,

495

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

TryTechnicals Pvt Ltd,

417

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

UGC Corporation,

446

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

UGC Corporation,

459

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

TryTechnicals Pvt Ltd,

489

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

TryTechnicals Pvt Ltd,

435

How can we achieve singleton pattern in iOS?

Winsol Solutions,

471

What is Delegation in iOS?

UGC Corporation,

453

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

TryTechnicals Pvt Ltd,

440

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

Winsol Solutions,

458

How to represent layer objects in iOS operating system ?

TryTechnicals Pvt Ltd,

445

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

TryTechnicals Pvt Ltd,

453

Is there any garbage collector concept available in iOS?

Winsol Solutions,

455

How can an operating system improve battery life while running an app in iOS operating system?

TryTechnicals Pvt Ltd,

408

What are layer objects in iOS operating system?

SwanSoft Technologies,

450


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Un-Answered Questions { Apple iOS }

What is an iphone app?

454


What is made up of nserror object?

449


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

519


What is foundation framework in ios?

441


What are all the newly added frameworks iOS 4.3 to iOS 5.0?

427






What is variable in ios?

437


When an app is said to be in active state?

420


What is the difference between atomic and non-atomic properties? Which is the default for synthesized properties? When would you use one over the other?

412


Flow of push notification?

486


Difference b/w collectionView & uitableview?

1925


are you using charlesproxy ? Why/why not ?

469


What is the difference between inheritance and category?

430


Explain mutable and immutable types in objective c programming language?

457


What is iphone sdk?

470


What are the requirements for developing iphone apps?

427