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Every object has : state, behavior and identity - 
 Question Submitted By :: OOAD
I also faced this Question!!     Answer Posted By  
# 1

Identity : Every instance of a class should be unique. e.g.
in memory, every object has its own memory address. This is
part of the unique id, other than which a user can have
member variables uniquely identifying the instance of the class.

State : Every object, at any given point of time would have
to have a set of attributes defining its State.

Behavior : Every object based on its state and optionally
identity will have particular behavior.
Is This Answer Correct ?    58 Yes 14 No
Benjamin Jacob
# 2
Object is an instance of the class.And oject must have the
identity because of object can be specified in Class. And
has carries the behaviour of that perticular class
Is This Answer Correct ?    11 Yes 28 No
Praveen Kumar

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