Objective-C Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Objective-C Interview Questions

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Explain what is protocol in objective-c?

What is toll-free bridging?

Explain what is @synthesize in objective-c?

Is objective c, a dynamic language? True/false, explain.

What is kvc and kvo? Give an example of using kvc to set value.

Does a thread created using performselectorinbackground:withobject: creates its own autorelease pool?

Can we create dynamic classes in objective c? If yes, explain how to create with a valid use case?

Who calls dealloc method?

What is responder chain?

What can’t we put into an array or dictionary?

Can I write some c++ function in same .m file?

Can we create dynamic classes in objective c?

What happen if we send any message to an object which is released?

Explain the difference between atomic and nonatomic synthesized properties.

How does dispatch_once manages to run only once?

Un-Answered Questions { Objective-C }

How can we put nil it into dictionary/array?

What is class extension?

How does dispatch_once manages to run only once?

What is .m file in objective c?

Is it possible to implement dealloc in arc?

What is gcd? What are its advantages over nsthread?

What number distinctive annotations is accessible in objective-c?

What is an nsobject?

Mention which class can you use for parsing of xml in iphone?

What are the three subatomic particles?

What is the point of closures?

How do I import a swift file into objective c?

Can I write some c++ function in same .m file?

Mention whether nsobject is a parent class or derived class.

Why swift is faster than objective c?

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