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 }

Can you differentiate polymorphism from abstraction?

Explain the types of protocol?

Does objective c have multiple inheritance?

Is reference counting garbage collection?

What are the characteristics of the category?

What happens with the objects if the array is released?

Mention what is the primary use of the category in the objective-c?

Why is objective c better than swift?

What are the attributes of category?

How to call objective c function in swift?

What is nsarray objective c?

What is hashable?

How to declare global variable in objective c?

Is swift or objective c better?

Explain types of protocol?

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