What is initialization in iOS?

What is optional chain in swift iOS ?

What is NSLog in iOS?

Explain what is JSON and uses of JSON in iOS?

How the NSDictionary and NSArray are represented in iOS ?

What are the control transfer statements used in swift iOS?

What is the difference between the frame and the bounds in iOS?

What is difference between CoreData and SQLite?

What are the maximum byte-size for a push notification to Apple Server?

What is a collection in iOS?

What is formal protocol in iOS Objective-C?

What is Cocoa?