State Independent Objects
They are modeless and always responds the same way to an event. For example, if an object receives a message, and the responding method always does the same thing. The object is state-independent with respect to that message.
State Dependent Objects
Those object which reacts differently to events depending on their state or mode. For example, a telephone is very state-dependent. The phone's
reaction to pushing a particular button (generating an event) depends on the
current mode of the phone off hook.