Explain types of protocol?
Who invented objective c?
What is .h and .m file in xcode?
What is an instancetype?
What’s the contrast between utilizing a delegate and warning?
What is a nsstring?
When is toll-free bridging useful?
What is polymorphism in objective-c?
How to convert nsnumber to nsstring in objective c?
What is abi stability?
What are objective c properties?
What is the difference between category and extension in objective c?
Is swift faster than objective c?
Is closure a function?
How big is a atom?