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,

906

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

TryTechnicals Pvt Ltd,

765

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

UGC Corporation,

834

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

UGC Corporation,

797

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

TryTechnicals Pvt Ltd,

921

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

TryTechnicals Pvt Ltd,

802

How can we achieve singleton pattern in iOS?

Winsol Solutions,

849

What is Delegation in iOS?

UGC Corporation,

807

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

TryTechnicals Pvt Ltd,

782

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

Winsol Solutions,

856

How to represent layer objects in iOS operating system ?

TryTechnicals Pvt Ltd,

807

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

TryTechnicals Pvt Ltd,

861

Is there any garbage collector concept available in iOS?

Winsol Solutions,

816

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

TryTechnicals Pvt Ltd,

814

What are layer objects in iOS operating system?

SwanSoft Technologies,

832

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Un-Answered Questions { Apple iOS }

What are the Steps for using coredata?

876

Explain usage of struct?

887

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

2200

Why do all model object attributes get marked with @dynamic and not synthesised? What does @dynamic mean?

754

Explain layer objects?

850

What is nspersistentstore?

931

What is messaging? How does the runtime handle message passing? What is message forwarding?

931

Explain difference between coredata & sqlite?

879

What are transient properties?

832

Which json framework is supported by ios? : IOS Architect

859

What is meaning of 'copy' keyword?

831

Which is the state an app reaches briefly on its way to being suspended?

784

What is nsuserdefaults?

838

What is nsmanagedobjectcontext? What are the different concurrency types? Explain them.

757

What is difference between weak and strong in ios?

769

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