INTRODUCTION TO INTERNET OF THINGS: Assignment 2

Answers will be updated shortly:

1. The MQTT publish-subscribe protocol is:
 
a. Event driven
b. Broker driven
c. Client driven
d. All of these

Ans: a

2. REST stands for

a. Representational state transfer
b. Resourceful sensor transfer
c. Resourceful state transport
d. None of these

Ans: a

3. Brokers in MQTT

a. Connects publishers and subscribers
b. Classify the sensor data into topics
c. Both of the above
d. None of the above

Ans: c

4. In AMQP, link initiation in order to send and recieve messages is done by which frame type

a. OPEN
b. ATTACH
c. BEGIN
d. FLOW

Ans: b

5. MQTT topics are

a. Simple floating point
b. Simple integer
c. Simple symbol
d. Simple string

Ans: d

6. CoAP stands for

a. Contention Application Protocol
b. Constrained Application Protocol
c. Cluster Application Protocol
d. Continuous Application Protocol

Ans: b

7. Which statement is TRUE w.r.t the IEEE 802.15.4 standard?

a. It is a low data rate standard
b. Used for architecting wireless PANs
c. Uses only 2 layers - PHY and MAC
d. All of these

Ans: d

8. In the network layer, Zigbee follows which routing scheme

a. AODV
b. DSDV
c. RIPv2
d. OSPF

Ans: a

9. XMPP protocol is

a. Service oriented middleware based on Hyper Text Markup Language (HTML)
b. Message oriented middleware based on Extensible Markup Language (XML)
c. Message oriented middleware based on Hyper Text Markup Language (HTML)
d. Service oriented middleware based on Extensible Markup Language (HTML)

Ans: b

10. In AMQP protocol, Attach frame is used to

a. Open connection
b. Informs the changes in state of transfer
c. Initiate new link
d. Terminate the link

Ans: c

11. Which of the following is/are the feature(s) of AMQP?

a. Targeted QoS
b. Persistence
c. High Speed Protocol
d. All of these

Ans: d

12. IEEE 802.15.4 uses which of the following for accessing the channel

a. Carrier Sense Multiple Access (CSMA)
b. Carrier Sense Multiple Access - Collision Detection  (CSMA-CD)
c. Carrier Sense Multiple Access - Collision Avoidance  (CSMA-CA)
d. None of these

Ans: c

13. Which of the following is not True Reduced function device (RFD) in IEEE 802.15.4

a. Can only talk to Full Function Device (FFD)
b. Can talk to all types of devices
c. Lower Power Consumption
d. Minimal CPU/RAM required

Ans: b

14. Which of the following is true for Zig-bee Router (ZR)

a. It contains just enough functionality to talk to the parent node, and it cannot relay data from other devices.
b. This allows the node to be asleep a significant amount of time thereby enhancing battery life
c. Capable of running applications, as well as relaying information between nodes connected to it.
d. Memory requirements and cost of ZEDs are quite low, as compared to ZR or ZC

Ans: c

15. RPL routing

a. Maintains routing topology using high rate beaconing
b. Maintains routing topology using low rate beaconing
c. Maintains routing topology without beaconing
d. None of these

Ans:b