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_________ specifies the function that will be called when there is a new message received from the channel.

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_________ specifies the function that will be called when there is a new message received from the channel.

(a) Reconnect

(b) Error

(c) Connect

(d) Callback

I got this question in an internship interview.

I'm obligated to ask this question of Sending and Receiving Data in Real Time Through Internet in portion Working with the Cloud of IOT

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Correct answer is (d) Callback

Easy explanation: The call to this message specifies many methods declared in the MessageChannel class

Callback: specifies the function that will be called when there is a new message received from the channel.

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