What is @dynamic directive meaning in iOS?

Are integers full-fledged objects in Objective-C?

Assume ARC is enabled... What would be another way to write this: NSArray *array = [NSArray arrayWithObjects:@"One", @"Two", @"Three",nil];

What happens at runtime with the following: NSObject* object = nil; NSObject* object2 = [object copy]; NSLog(@"%@", object2);

What is one source of particles that are emitted by a CAEmitterLayer object?

In Core Data, what is the name of an object representation of a record?

Which of the following is true?

If a is an integer, the expression !a (...)?

As categories can't have instance variables, what class could you use to implement a full class only with categories

Using object-oriented programming the object that sends a message

All of the methods in a (...) annotated with @required must be implemented.