Apple iOS Interview Questions
Questions Answers Views Company eMail

What is iOS?  

2 1090

What's fast enumeration?

2 1045

What are the differences between categories and extensions?

1 866




What is a singleton?

1 755

Name and explain the iOS app states.

1 901

What are the memory management rules?

1 852

Name the memory management rules and their related methods.

1 867

Explain why delegates and notifications are different.

1 813




What is lazy loading?

1 898

Explain shallow copying and depth copying.

1 754

What is a struct?

1 869

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

1 1251

What is posing in iOS?

1 1737

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

1 736

Does iOs supports multitasking?

1 807


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Un-Answered Questions { Apple iOS }

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

1261


Find the letter count in UItextfield? Including first character?

550


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

437


Explain your process for tracing and fixing a memory leak

1467


Explain which all events will perform an ios application in background

605






Difference b/w collectionView & uitableview?

809


When dealing with property declarations, what is the difference between atomic and non-atomic?

521


Explain @synchronized ,@dynamic

710


How to convert MVC design pattern to MVVM design patterns

481


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

399


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

398


Explain how an autorelease pool works at the runtime level

1422


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

389


Difference between iOS 3 , iOS4, iOS 5, iOS 6, iOS 7 and iOS 8 (What are the new features)

593


Explain application states

363