Q. The messageChannel class declares the _________ class attribute that defines the key string.

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Q. _________ method saves the received arguments in three attributes.

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Q. _________ and _________ saves the publish and subscribe keys that we have generated with the PubNub Admin portal.

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

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Q. _________ specifies the function that will be called on an error event.

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Q. _________ Specifies the function that will be called when a successful connection with the PubNub cloud.

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Q. _________ specifies the function that will be called when a successful re-connection is completed.

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Q. ___________ specifies the function that will be called when the client disconnects.

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Q. What is the java extension file in IoT?

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Q. Do we run our program in the same computer where we have written?

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Q. Publish command message is sent from _________

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Q. The message is sent to the input queue of a message flow that contains a _________

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Q. Does user has authority for all topics.

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Q. ROSTOPIC uses _________ at the command line for representing the content of the message.

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Q. Which command displays the band width?

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Q. rostopic delay will provide delay for ___________

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Q. Which command displays messages published to a topic?

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Q. Which command finds out the topic?

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Q. Publishing messages is handled through ________ Class.

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Q. client() class provides ________ to create topics.

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