Apple iOS Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Apple iOS Interview Questions

Questions Answers Views Company eMail

What is App Bundle in iOS operating system?

TryTechnicals Pvt Ltd,

952

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

TryTechnicals Pvt Ltd,

815

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

UGC Corporation,

881

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

UGC Corporation,

847

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

TryTechnicals Pvt Ltd,

960

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

TryTechnicals Pvt Ltd,

847

How can we achieve singleton pattern in iOS?

Winsol Solutions,

898

What is Delegation in iOS?

UGC Corporation,

848

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

TryTechnicals Pvt Ltd,

830

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

Winsol Solutions,

914

How to represent layer objects in iOS operating system ?

TryTechnicals Pvt Ltd,

858

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

TryTechnicals Pvt Ltd,

913

Is there any garbage collector concept available in iOS?

Winsol Solutions,

860

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

TryTechnicals Pvt Ltd,

851

What are layer objects in iOS operating system?

SwanSoft Technologies,

881

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Un-Answered Questions { Apple iOS }

What is a background thread?

896

What is sandbox in iOS operating system?

1002

Difference between coredata & sqlite?

987

Compare and contrast the different ways of achieving concurrency in os x and ios.

970

How to set your application id after becoming a member of iphone developer program?

809

What are the Different types of persistent stores?

913

Explain parent-child context setup?

819

What is singleton pattern in ios?

826

What is gcd? How is it used?

816

What is fast enumeration?

897

Differentiate between release and pool drain?

905

Explain the correct way to manage Outlets memory in iOS.

837

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

1448

What is the difference between atomic and nonatomic properties?

914

What is synchronous web request and asynchronous ?

897

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