What does the Interface Builder in Xcode do?

________ are NOT a Cocoa event.

Which one is not a Navigator in Xcode?

Which does not belong in web infrastructure:

A ______ object sends a message automatically to a target when an on-screen object is manipulated.

The ________ object is the application's main controlling object.

The ______ is a section of code that reads events and performs appropriate functions for those events.

The ________ is a framework that contains all the objects needed to implement a graphical event-driven user interface.

The Mac OS X graphical user interface (GUI) is called _________.

True or False? NSNumber objects cannot be changed after initialization.

NSDocument class is used for ______.