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


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


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


What is the methods for unzip file in AFNetworking


Difference b/w collectionView & uitableview?


Explain Apple push notification


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


Explain which all events will perform an ios application in background


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


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


Explain how an autorelease pool works at the runtime level


Explain @synchronized ,@dynamic


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


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


How to convert MVC design pattern to MVVM design patterns