Why create a custom view?

1

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

1

How do you define a block?

1

What do you understand by protocol?

1

What is the point of closures?

1

What is the use of category in objective-c?

1

How to convert nsnumber to nsstring in objective c?

1

Can we implement dealloc in arc? If yes, what is the need to do that?

1

What is posing in objective c?

1

What is a delegate in objective c?

1

When is toll-free bridging useful?

1

What are the two types of m files?

1

Who invented objective c?

1

Is swift or objective c better?

1

What are kvc and kvo? Provide an example.

1