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

Objective-C Interview Questions

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Can a static library (.a) contain resources like images, sound files etc?

What is the difference between underscore and self (i.e self.xx and _xx) ?

When might you use a cfarray/dictionary instead of a nsarray/dictionary?

What is a process and thread?

What are blocks and how are they used?

Can I write some c++ function in same .m file? Will it compile? If no, what changes should I do to compile it?

What are the adavantages of gcd over nsthread?

What is class extension? Why do we require them?

When to use nsautoreleasepool??

Un-Answered Questions { Objective-C }

What are some of the major differences between objective c and swift?

What is mark and sweep algorithm?

Distinguish between @synthesize and @dynamic in objective –c?

What are nsautoreleasepool and how can we use them?

Can protocols have properties?

What is the protocol in objective c?

What is objective point of view?

What does mean in xcode?

What is the difference between string and nsstring?

What is a delegation protocol?

Explain when to use nsarray and nsmutablearray. Which one is faster and threadsafe?

What is a hash string?

How to check array contains value in objective c?

When should you call dealloc method? Is it possible to implement dealloc in arc?

What is the main difference between function calls and messages?

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