Answer Posted / maanya shree
Pub/sub messaging has the following characteristics :
a) Each message can have multiple consumers.
b)Publishers and subscribers have a timing dependency. A client that subscribes to a topic can consume only messages published after the client has created a subscription, and the subscriber must continue to be active in order for it to consume messages.
What Point-to-Point Messaging in JMS ? view answer
a) Each message has only one consumer.
b) A sender and a receiver of a message have no timing dependencies. The receiver can fetch the message whether or not it was running when the client sent the message.
c)The receiver acknowledges the successful processing of a message.
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