Which of the following contains the INCORRECT definition of a bitwise operator ?

While calling a function by reference, it will copy the address of an argument into the formal parameter.

Which one contains the INCORRECT definition of a preprocessor directive ?

In (...), the system uses the same reference counting system as (...), but it inserts the appropriate memory management method calls for us at compile-time.

Which one contains the INCORRECT definition of a Predefined Macro ?

What's the hierarchy of UIButton until NSObject ?

A class can have two methods with the same name, but with different argument types?

What can you use to avoid the msgSend function overhead?

What is #import?

Which of the following creates a class that conforms to a protocol?

Can an exception caught in @catch be re-thrown?