Hi aman,

√ SAO (Server Activated Objects) also called as Well-Known call mode.
√ CAO (Client Activated Objects)

SAO has two modes “Single Call” and “Singleton”. With Single Call object the object is created with every method call thus making the object stateless. With Singleton the object is created only once and the object is shared with all clients.
CAO are stateful as compared to SAO. In CAO the creation request is sent from client side. Client holds a proxy to the server object created on server.

__________________
Krishnakumar.S
Beware of Everything -that is un true; stick to the Truth shall succeed slowly but steadily