Unit 3

Question 1

What does the term “M2M” in IoT refer to?
A) Machine to Microcontroller
B) Module to Module
C) Machine to Machine communication
D) Manual to Machine operation

Answer 1

Machine to Machine communication

Question 2

In IoT networking, what is the main role of a gateway device?
A) To store large data
B) To provide human interface
C) To connect devices to the cloud or external network
D) To act as a power source

Answer 2

To connect devices to the cloud or external network

Question 3

Which technology is most closely associated with short-range IoT communication?
A) LoRaWAN
B) Bluetooth
C) LTE
D) 5G

Answer 3

Bluetooth

Question 4

Which of these is NOT a component of the Internet structure?
A) Edge router
B) Sensor node
C) Internet backbone
D) Domain Name Server

Answer 4

Sensor node

Question 5

Which IoT communication model would you apply for bidirectional communication in real-time?
A) Request-Response
B) Publish-Subscribe
C) Push-Pull
D) Polling

Answer 5

Publish-Subscribe

Question 6

You are designing an agricultural IoT solution. Which connectivity technology would best support low-power, long-range communication?
A) ZigBee
B) Wi-Fi
C) LoRa
D) NFC

Answer 6

LoRa

Question 7

Analyze the four pillars of IoT. Which one is primarily responsible for data acquisition from physical environments?
A) RFID
B) M2M
C) SCADA
D) WSN

Answer 7

WSN

Question 8

What are the key steps in IoT design methodology?

Answer 8

Define Purpose → Model Devices → Functional View → Information Model → Communication → Constraints → Service Integration

Question 8

What is the primary limitation of using RFID in dynamic outdoor IoT environments?
A) High bandwidth
B) Low read range and sensitivity to obstacles
C) High memory usage
D) Too much power consumption

Answer 8

Low read range and sensitivity to obstacles

Question 9

What does M2M stand for and what does it enable?

Answer 9

Machine-to-Machine communication; enables devices to exchange data without human interaction

Question 10

Which communication model is commonly used in MQTT protocol?

Answer 10

Publish-Subscribe

Question 11

Define SCADA in the context of IoT.

Answer 11

Supervisory Control and Data Acquisition: used for real-time monitoring in industrial systems

Question 11

What are the four pillars of IoT?

Answer 11

M2M, SCADA, WSN, RFID

Question 12

Why are gateways essential in IoT architecture?

Answer 12

They translate and route data between local networks and cloud services

Question 12

Difference between ZigBee and LoRa in IoT connectivity?

Answer 12

ZigBee: short range, low power. LoRa: long range, ultra-low power