• Card 19 / 24: Which is true about synchronous and asynchronous messaging in JMS?
    A) a QueueReceiver or a TopicSubscriber in JMS, use the receive() method to consume a message synchronously
    B) a QueueReceiver or a TopicSubscriber in JMS, must use a message listener to consume a message synchronously
    C) a QueueReceiver or a TopicSubscriber in JMS, can consume a message asynchronously by using a message listener
    D) in asynchronous messaging, the onMessage() method of the consumer is invoked when a message arrives

    Answer:
    A) a QueueReceiver or a TopicSubscriber in JMS, use the receive() method to consume a message synchronously
    C) a QueueReceiver or a TopicSubscriber in JMS, can consume a message asynchronously by using a message listener
    D) in asynchronous messaging, the onMessage() method of the consumer is invoked when a message arrives

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