| 1. |
allows us to control electronic components |
| A. | retful api |
| B. | restful api |
| C. | http |
| D. | mqtt |
| Answer» A. retful api | |
| 2. |
MQTT stands for |
| A. | mq telemetry things |
| B. | mq transport telemetry |
| C. | mq transport things |
| D. | mq telemetry transport |
| Answer» D. mq telemetry transport | |
| 3. |
MQTT is better than HTTP for sending and receiving data. |
| A. | true |
| B. | false |
| Answer» A. 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» C. machine to machine and internet of things | |
| 5. |
Which protocol is lightweight? |
| A. | mqtt |
| B. | http |
| C. | coap |
| D. | spi |
| Answer» A. mqtt | |
| 6. |
PubNub publishes and subscribes in order to send and receive messages. |
| A. | network |
| B. | account |
| C. | portal |
| D. | keys |
| Answer» D. 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» B. 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» A. command_key | |
| 9. |
method saves the received arguments in three attributes. |
| A. | init |
| B. | init |
| C. | init |
| D. | _init_ |
| Answer» C. 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» A. 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» D. callback | |
| 12. |
specifies the function that will be called on an error event. |
| A. | callback |
| B. | error |
| C. | connect |
| D. | reconnect |
| Answer» B. 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» C. 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» D. reconnect | |
| 15. |
specifies the function that will be called when the client disconnects. |
| A. | callback |
| B. | error |
| C. | connect |
| D. | reconnect |
| Answer» D. reconnect | |
| 16. |
The number of elements in the Open IoT Architecture? |
| A. | 6 elements |
| B. | 8 elements |
| C. | 7 elements |
| D. | 3 elements |
| Answer» C. 7 elements | |
| 17. |
Global Sensor Network is built for |
| A. | reducing cost and time for development |
| B. | reducing cost and increasing time for development |
| C. | increasing cost and increasing time for development |
| D. | increasing cost and decreasing time for development |
| Answer» A. reducing cost and time for development | |
| 18. |
One of the main characteristics of Linked Stream Data is “Live Streaming”. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 19. |
The huge number of devices connected to the Internet of Things has to communicate automatically, not via humans. What is this called? |
| A. | skynet |
| B. | bot 2 bot |
| C. | machine 2 machine |
| D. | intercloud |
| Answer» C. machine 2 machine | |
| 20. |
Internet of Things needs a lot of network connection. What is the proposed “white Space” radio standard called? |
| A. | bluetooth |
| B. | wimax |
| C. | weightless |
| D. | zigbee |
| Answer» C. weightless | |
| 21. |
What is the sensor/protocol used in GSN? |
| A. | http protocol |
| B. | coap protocol |
| C. | mqtt protocol |
| D. | xmpp protocol |
| Answer» B. coap protocol | |
| 22. |
Which is the core wrapper of GSN? |
| A. | serial |
| B. | udp |
| C. | gpstest |
| D. | zeromqwrapper |
| Answer» D. zeromqwrapper | |
| 23. |
Open IoT ontology is extending the W3C SSN ontology which supports the description of the physical and processing structure of sensors. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 24. |
Open IoT manages the registration, data acquisition, deployment of sensors and interconnected of objects, through which network? |
| A. | gsn |
| B. | x-gsn |
| C. | lsm |
| D. | http |
| Answer» B. x-gsn | |
| 25. |
Which environment does Global Sensor Network work on? |
| A. | c++ |
| B. | java |
| C. | html |
| D. | c |
| Answer» B. java | |
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