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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Q. ________ method publishes messages to pub/sub.

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Q. How many arguments are accepted by publish()?

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Q. Does publish() method accepts arbitrary arguments.

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Q. The topic in the publish method is in which form?

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Q. The message in pub/sub is an opaque blob of ________

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Q. ________ error will show if we try to send text string instead of bytes.

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Q. What do we call string in python 2?

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Q. When you publish a message ________ is automatically created?

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Q. When the batch is created, it begins a countdown that publishes the batch once sufficient time has elapsed.

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Q. What is the time elapsed after a batch is created?

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Q. Every call to publish() will return a class that conforms to the __________ interface.

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Q. __________ performs two functions toward the delivery of the services.

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