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Question about JMS

 
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Hello All,
While solving mock exam one question come to on JMS is

6. Which of the following are true about Publish/Subscribe:

�Subscribers receive a copy of every message
�It is a Pull (Polling) based model
�It is a push-based model
�It is generally used when one publisher wishes to send a message to one subscriber
I am not sure whats the correct answer .Please help!!!
 
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"Subscribers receive a copy of every message" is my choice if I can only choose one.
 
Apratim Khandalkar
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But also can we say that it is also
It is a Pull (Polling) based model
 
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