What is singleton design pattern in ios?
What is automatic reference counting (arc)?
What is the difference between android and ios?
Is the object retained if I call performSelector:withObject:afterDelay:?
What is fast enumeration in iOS operating system?
Explain UIView life cycles
Define cocoa?
What’s the difference between an “app id” and a “bundle id” and what is each used for?
What is the difference between NSArray and NSMutableArray in iOS operating system?
Which object manage the presentation of app's content on the screen?
Explain usage of struct?
Why do all model object attributes get marked with @dynamic and not synthesised? What does @dynamic mean?
What are moments and collections?