Apple iOS Interview Questions
Questions Answers Views Company eMail

What is iOS?  

2 1165

What's fast enumeration?

2 1119

What are the differences between categories and extensions?

1 922




What is a singleton?

1 816

Name and explain the iOS app states.

1 953

What are the memory management rules?

1 911

Name the memory management rules and their related methods.

1 921

Explain why delegates and notifications are different.

1 869




What is lazy loading?

1 957

Explain shallow copying and depth copying.

1 818

What is a struct?

1 927

Is the object retained if I call performSelector:withObject:afterDelay:?

1 1321

What is posing in iOS?

1 1800

Where do you test the developed apps if you do not have the device?

1 788

Does iOs supports multitasking?

1 856


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Un-Answered Questions { Apple iOS }

Explain application states

382


Explain about AFNetworking. What is the base class used in AFNetworking library

1292


what is your preferred programming language? Why? How long will it take you to learn a new programming language?

425


What is the methods for unzip file in AFNetworking

878


Difference b/w collectionView & uitableview?

923






Explain Apple push notification

466


How will you implement sets and the intersection operation? Complexity?

428


Explain which all events will perform an ios application in background

626


If you use location services in your app, will it drain your battery.if yes? How can we avoid?

416


How to do upload of large sized video file to server ? while uploading user presses “Homebutton” How long will execute?

459


Explain how an autorelease pool works at the runtime level

1455


Explain @synchronized ,@dynamic

735


what is the difference between nonatomic & atomic ? which is thread safe and why

530


Explain what is the stack of autorelease pools. How autorelease pool work under the hood?

482


How to convert MVC design pattern to MVVM design patterns

502