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Java / JMS

Explain Exclusive and non-exclusive queues.

Exclusive type queues, allow multiple consumers to connect however always one becomes active and continue to consume message from the queue. When the active consumer crashes, one of the standby consumers become active and continue to consume/process messages from the queue. Exclusive queues facilitate fault tolerance.

Non-Exclusive queues, allow multiple consumers to connect and also allow them to consume messages in round-robin fashion. Non-Exclusive queue enable load-balancing.

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