IOT Multiple Choice Questions and Answers – Sending and Receiving Data in Real Time Through Internet | IOT MCQs

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Questions
1 _________ allows us to control electronic components
A RETful API
B RESTful API
C HTTP
D MQTT

Answer: RETful API
2 MQTT stands for _____________
A MQ Telemetry Things
B MQ Transport Telemetry
C MQ Transport Things
D MQ Telemetry Transport

Answer: MQ Telemetry Transport
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3 MQTT is better than HTTP for sending and receiving data.
A True
B False

Answer: True
4 MQTT is _________ protocol.
A Machine to Machine
B Internet of Things
C Machine to Machine and Internet of Things
D Machine Things

Answer: Machine to Machine and Internet of Things
5 Which protocol is lightweight?
A MQTT
B HTTP
C CoAP
D SPI

Answer: MQTT
6 PubNub publishes and subscribes _________ in order to send and receive messages.
A Network
B Account
C Portal
D Keys

Answer: Keys
7 By clicking which key the PubNub will display public, subscribe, and secret keys.
A Pane
B Demo Keyset
C Portal
D Network

Answer: Demo Keyset
8 The messageChannel class declares the _________ class attribute that defines the key string.
A command_key
B command-key
C commandkey
D Key_command

Answer: command_key
9 _________ method saves the received arguments in three attributes.
A __Init
B Init__
C __Init__
D _init_

Answer: __Init__
10 _________ and _________ saves the publish and subscribe keys that we have generated with the PubNub Admin portal.
A public_key and subscribe_key
B Public-key and subscribe-key
C publickey and subscribekey
D Key_public and key_subscribe

Answer: public_key and subscribe_key
11 _________ 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

Answer: Callback
12 _________ specifies the function that will be called on an error event.
A Callback
B Error
C Connect
D Reconnect

Answer: Error
13 _________ Specifies the function that will be called when a successful connection with the PubNub cloud.
A Callback
B Error
C Connect
D Reconnect

Answer: Connect
14 _________ specifies the function that will be called when a successful re-connection is completed.
A Callback
B Error
C Connect
D Reconnect

Answer: Reconnect
15 ___________ specifies the function that will be called when the client disconnects.
A Callback
B Error
C Connect
D Disconnect

Answer: Disconnect

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