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Meaning of active and passive objects

Illustrate in brief the meaning of active and passive objects?

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The active objects are one which instigates an interaction that owns a thread and they are answerable for handling control to the other objects. In simple terms it can be referred as client.

The passive objects are one that passively waits for the message to be processed. This waits for the other object which needs its services. In simple terms it can be termed to as server.

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