While calling a function by reference, it will copy the address of an argument into the formal parameter. Inside the function, the address is used to access the actual argument used in the call. This means that changes made to the parameter affect the argument. Is the statement above True ?

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 ?

(...) are used by Cocoa and Cocoa Touch objects for a variety of different situations

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?

What class specifiers are supported?