IoT (Internet of Things) MCQs

1. When was the term IoT first coined?

1. 1995
2. 1996
3. 1999
4. None of the above

Answer: C) 1999

Explanation:

IoT stands for Internet of Things. It was coined in 1999 by the computer scientist Kevin Ashton.

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2. How many layers are there in standard IoT architecture?

1. 4
2. 5
3. 6
4. 7

Answer: B) 5

Explanation:

The IoT architecture has five layers that interact to offer consumers the best services possible.

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3. The topmost layer of the IoT architecture is ____.

1. Application Layer
2. Network Layer
3. Communication Layer
4. Perception Layer

Answer: A) Application Layer

Explanation:

The topmost layer of the IoT architecture is the application layer, which provides an interface that allows users to interact with the IoT system.

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4. Once the data sensing is done, ____ are required to facilitate the data transfer.

1. Sensors
2. Gateways
3. Cloud devices
4. GPS

Answer: B) Gateways

Explanation:

Once we gather data from the sensor, efficient gateways and networks help to transfer data in IoT.

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5. In IoT architecture, which layer/layers use networking technologies like 3G, 4G, UTMS, etc. to transfer data?

1. Application Layer
2. Perception Layer
3. Network Layer
4. All of the above

Answer: C) Network Layer

Explanation:

The network layer receives data from the perception layer and transmits it to the middleware layer using various networking technologies such as 3G, 4G, UMTS, WiFi, and infrared.

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6. Which of the following is an advantage of the Internet of Things (IoT)?

1. Increased human effort
2. Reduced resource utilisation
3. Enhanced data collection
4. Decreased security

Answer: C) Enhanced data collection

Explanation:

The Internet of Things helps gather more information from various devices, making it easier to collect and analyse data.

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7. What is a significant disadvantage of IoT?

1. Simplifies system design and maintenance
2. Increases privacy concerns
3. Reduces the amount of personal data shared
4. Minimizes network attacks

Answer: B) Increases privacy concerns

Explanation:

The Internet of Things can share a lot of personal information without the user actively providing it, which raises privacy concerns.

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8. Which of the following is an embedded system hardware component in IoT?

1. Linux operating system
2. Motorola 68HC11 microcontroller
3. Microsoft Office software
4. Wi-Fi router

Answer: B) Motorola 68HC11 microcontroller

Explanation:

The Motorola 68HC11 microcontroller is an example of embedded system hardware. It is a type of RISC family microcontroller commonly used in embedded systems due to its integrated circuit and internal memory, which allow it to perform specific tasks efficiently.

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9. What is the primary function of smart devices within the IoT ecosystem?

1. To store large amounts of data
2. To manufacture other devices
3. To create user interfaces
4. To send and receive data over networks

Answer: D) To send and receive data over networks

Explanation:

In the IoT ecosystem, smart devices such as smartphones, tablets, and sensors are used to send commands or requests for information and to receive responses.

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10. Which components are typically involved in the data transfer process within the IoT ecosystem?

1. Desktop computers and printers
2. Cloud Computing and Big Data
3. Paper documents and physical files
4. Mechanical switches and knobs

Answer: B) Cloud Computing and Big Data

Explanation:

In the IoT ecosystem, data transfer and communication between smart devices often involve Cloud Computing and Big Data.

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11. What is the primary benefit of IoT in smart cities?

1. Creating new parks
2. Real-time data for better decision-making
3. Increasing taxes
4. Building taller buildings

Answer: B) Real-time data for better decision-making

Explanation:

IoT provides real-time data that helps city officials make better decisions about managing resources and services.

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12. What is the challenge of IoT implementation in smart cities?

1. Lack of urban space
2. Security and data privacy issues
3. Too many trees
4. High literacy rates

Answer: B) Security and data privacy issues

Explanation:

Security and data privacy issues are some of the challenges in implementing IoT smart cities as IoT gadgets might be vulnerable to cyberattacks.

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13. What is the full form of LoRaWAN?

1. Low Range Wide Area Network
2. Long Range Wireless Area Network
3. Low Radiation Wireless Area Network
4. None of the above

Answer: A) Low Range Wide Area Network

Explanation:

LoRaWAN stands for Long Range Wide Area Network. It is a communication protocol that enables devices to communicate using a wireless technology namely Long Range (LoRa).

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14. How many layers are there in the architecture of oneM2M?

1. Two
2. Three
3. Four
4. Five

Answer: B) Three

Explanation:

The oneM2M architecture has 3 layers, namely

• Application Layer
• Services Layer
• Network Layer

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15. Which of the following is/are an IoT-enabling technology?

1. Cloud Computing
2. Communication Protocols
3. Machine Learning
4. All of the above

Answer: D) All of the above

Explanation:

Cloud computing stores and processes IoT data, communication protocols enable device connectivity, and machine learning empowers devices to analyse data and make informed decisions autonomously.

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16. The full form of MQTT is ____.

1. Message Queue Technology Transfer
2. Message Queue Telemetry Transport
3. Message Queue Technology Transport
4. None of the above

Answer: B) Message Queue Telemetry Transport

Explanation:

Message Queue Telemetry Transport or MQTT is a lightweight messaging protocol in IoT.

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17. At which IoT level does a single device manage sensing, monitoring, actuation, and hosting applications?

1. Level 2
2. Level 3
3. Level 4
4. Level 5

Answer: B) Level 3

Explanation:

In Level 3 IoT, a single device handles sensing, monitoring, actuation, and hosting applications.

Read more: IoT Levels and Deployment Templates

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18. Which database is commonly used for IoT applications that require real-time data analysis?

1. MySQL
2. PostgreSQL
3. Oracle
4. InfluxDB

Answer: D) InfluxDB

Explanation:

InfluxDB is specifically designed for high-volume, high-velocity data, which makes it a popular choice for IoT applications that involve real-time data analysis.

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19. Which feature is a significant advantage of IPv6 over IPv4 in IoT communication?

1. Larger address space
2. Smaller header size
3. Basic security features
4. Limited scalability

Answer: A) Larger address space

Explanation:

IPv6's 128-bit address space allows for virtually limitless addresses, accommodating the growing number of devices in IoT deployments.

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20. Which cellular technology is best for IoT projects requiring high data transfer rates?

1. 2G
2. 3G
3. 4G
4. 5G

Answer: D) 5G

Explanation:

5G is the best cellular technology for IoT projects requiring high data transfer rates.

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21. Which IEEE standard is specifically designed for short-range communication within 10 meters in IoT applications?

1. IEEE 802.15.4e
2. IEEE 802.11ah
3. IEEE 802.15.4
4. IEEE 802.11

Answer: C) IEEE 802.15.4

Explanation:

IEEE 802.15.4 is designed for short-range communication within 10 meters, making it suitable for IoT applications like smart home devices and wearable technology.

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22. Which feature is added by IEEE 802.15.4e to enhance communication reliability and security in IoT networks?

1. Long-range communication
2. Time-slotted channel access (TSCH)
3. Low data rate
4. Support for multiple topologies

Answer: B) Time-slotted channel access (TSCH)

Explanation:

IEEE 802.15.4e introduces TSCH, allowing devices to coordinate transmissions to avoid collisions and improve reliability, enhancing communication in industrial automation and smart city applications.

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23. What programming language does Arduino IDE primarily use?

1. Python
2. JavaScript
3. C++
4. Java

Answer: C) C++

Explanation:

Arduino IDE primarily uses C++ for programming microcontrollers. C++ is a widely used programming language known for its versatility and efficiency, making it suitable for embedded systems like those used in Arduino boards.

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24. The IoT contribute to energy management in residential areas by ____.

1. Increasing energy costs
2. Monitoring and optimising device usage
3. Randomly switching on/off lights
4. Ignoring energy consumption patterns

Answer: B) Monitoring and optimising device usage

Explanation:

IoT helps in optimising energy use in homes by monitoring devices and systems. This allows for better control and reduction of energy costs.

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25. What is the primary benefit of implementing IoT in commercial energy management?

1. Increasing energy wastage
2. Lowering production costs
3. Ignoring energy consumption
4. Maintaining high energy costs

Answer: B) Lowering production costs

Explanation:

IoT enables monitoring and optimizing energy consumption in businesses, which leads to lower production costs and improved efficiency.

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26. How does IoT ensure reliability in energy systems?

1. By causing equipment damage
2. By increasing downtime
3. By detecting and addressing system threats
4. By ignoring system performance issues

Answer: C) By detecting and addressing system threats

Explanation:

IoT technology detects threats to system performance, such as equipment damage or downtime, and takes action to mitigate these risks.

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27. What defines a smart object in the context of IoT?

1. Passive, analog, and standalone
2. Energy-efficient, static, and non-configurable
3. Non-digital, offline, and non-communicative
4. Digital, networked, and autonomous

Answer: D) Digital, networked, and autonomous

Explanation:

The physical objects that are digital, networked and autonomous are termed as smart objects in IoT.

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28. Security and privacy are of big concern for smart object-based loT systems?

1. True
2. False
3. Can't say anything
4. None of the above

Answer: A) True

Explanation:

Yes. Security and privacy are of big concern for smart object-based loT systems.

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29. Which of the following are smart objects?

1. Smartwatch
2. Smart light bulbs
3. Smart bed
4. All of the above

Answer: D) All of the above

Explanation:

A smart object is something that not only interacts with people but also with other smart things.

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30. Which one of the following is not a top IoT Trend in 2024?

1. IoT Powered with 5G Technology
2. Metaverse
3. Digital Twins
4. Smartphones

Answer: D) Smartphones

Explanation:

Smartphones, while crucial in our daily lives, aren't highlighted as a top IoT trend in 2024, unlike IoT powered by 5G, the Metaverse, and Digital Twins.

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31. The 5V's of Big data include?

1. Value, Variety, Velocity, Veracity, Volume
2. Value, Variety, Virtual, Veracity, Volume
3. Value, Variety, Various, Versatile, Volume
4. Value, Variety, Virtual, Various, Volume

Answer: A) Value, Variety, Velocity, Veracity, Volume

Explanation:

The 5Vs of big data are:

• value (meaningful data)
• variety (different types of data)
• velocity (speed at which data is generated)
• veracity (accuracy)
• and volume (huge amount of data)

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32. Microsoft Azure IoT is a ____.

1. Hardware
2. IoT platform
3. Programming Language
4. None of the above

Answer: B) IoT platform

Explanation:

Microsoft Azure is an IoT platform managed by Microsoft for processing large amounts of data using AI and ML algorithms.

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33. Which company developed the Artik Cloud IoT platform?

1. Google
2. Microsoft
3. Samsung
4. Bosch

Answer: C) Samsung

Explanation:

The Artik Cloud IoT platform was developed by Samsung to enable devices to connect to cloud services and gather data continuously.

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34. Which IoT platform is known for handling large amounts of data using Cloud IoT Core and applying BigQuery analysis?

1. Amazon Web Services (AWS) IoT
2. Microsoft Azure IoT
3. Google Cloud Platform IoT
4. IBM Watson IoT

Answer: C) Google Cloud Platform IoT

Explanation:

Google Cloud Platform IoT uses Cloud IoT Core to manage large volumes of data and supports BigQuery analysis.

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35. Which Bluetooth version is specifically developed for the Internet of Things (IoT)?

1. Bluetooth 3.0
2. Bluetooth 4.2
3. Bluetooth 5.0
4. Bluetooth SmartReady

Answer: C) Bluetooth 5.0

Explanation:

Bluetooth 5.0, introduced as Bluetooth 5, has been specifically developed with features to support the Internet of Things (IoT).

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36. Which frequency band does Bluetooth operate within?

1. 900 MHz
2. 2.4 GHz
3. 5 GHz
4. 908.42 MHz

Answer: B) 2.4 GHz

Explanation:

Bluetooth operates within the 2.4 GHz ISM band frequencies.

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37. What is a key feature of Bluetooth Low Energy (BLE) that helps it conserve power?

1. It operates in a mesh network architecture
2. It always remains in sleep mode except during data transmission
3. It uses a high data transfer rate of 3 Mbps
4. It supports only point-to-point communication

Answer: B) It always remains in sleep mode except during data transmission

Explanation:

BLE conserves power by remaining in sleep mode except when the connection between devices is initiated and data transmission occurs.

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38. What is the data transfer rate of the Z-Wave protocol?

1. 250 kbps
2. 50 kbps
3. 3 Mbps
4. 100 kbps

Answer: D) 100 kbps

Explanation:

The Z-Wave protocol has a data transfer rate of 100 kbps.

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39. Which of the following IoT Data Link communication protocols operates at the longest range in a suburban environment?

1. Bluetooth
2. Z-Wave
3. ZigBee
4. LoRaWAN

Answer: D) LoRaWAN

Explanation:

LoRaWAN operates at a range of up to 15 km in a suburban environment.

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40. The full form CARP in the context of IoT is?

1. Channel-Aware Routing Protocol
2. Channel And Routing Protocol
3. Channel Advanced Routing Protocol
4. None of the above

Answer: A) Channel-Aware Routing Protocol

Explanation:

CARP (Channel-Aware Routing Protocol) is a distributed routing protocol, designed for underwater communication.

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41. Which sector is most prominently associated with the adoption of Industrial IoT, particularly under the concept of Industry 4.0?

1. Healthcare
2. Agriculture
3. Manufacturing
4. Water Management

Answer: C) Manufacturing

Explanation:

Among the four options above, the manufacturing industry is the most prominently associated with Industrial IoT.

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42. Fog Computing operates close to the network's ____ to minimise latency and provide faster responses.

1. Core
2. Edge
3. Center
4. Hub

Answer: B) Edge

Explanation:

Fog computing is designed to handle data processing and storage near the data source at the network's edge.

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43. Fog Computing requires all data to be sent to a central cloud server for processing and storage. True or False?

1. True
2. False
3. Can't say anything
4. None of the above

Answer: A) True

Explanation:

True. Fog Computing requires all data to be sent to a central cloud server for processing and storage.

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44. What is the core principle of CPwE in manufacturing networks?

1. Simplicity
2. Scalability
3. Cost
4. Design

Answer: B) Scalability

Explanation:

Scalability is a core principle of CPwE, ensuring the network can grow with increasing production requirements and new equipment.

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45. CPwE enables the convergence of which two network types?

1. LAN and WAN
2. VPN and Ethernet
3. Wi-Fi and 5G
4. OT and IT

Answer: D) OT and IT

Explanation:

CPwE facilitates the integration of Operational Technology (OT) and Information Technology (IT) networks.

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46. What type of frequencies does LoRaWAN operate on?

1. Licensed
2. Unlicensed
3. Satellite
4. Fiber optic

Answer: B) Unlicensed

Explanation:

LoRaWAN operates on unlicensed frequencies.

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47. Which feature of LoRaWAN allows devices to have longer battery life?

1. High bandwidth
2. High frequency
3. Low power consumption
4. Multi-channel support

Answer: C) Low power consumption

Explanation:

LoRaWAN is designed for low power consumption, enabling devices to operate on battery power for extended periods, which is essential for IoT applications.

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48. In which area is LoRaWAN commonly used for applications like environmental monitoring and traffic control?

1. Healthcare
2. Agriculture
3. Smart cities
4. Logistics

Answer: C) Smart cities

Explanation:

LoRaWAN finds common applications in smart cities, where it is used for various purposes, including environmental monitoring, waste management, and traffic control.

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49. To trigger an Amazon echo IoT Device, which command is used?

1. Alex
2. Siri
3. Amazon
4. Google

Answer: A) Alex

Explanation:

Alex command is used to trigger an Amazon echo IoT device.

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50. Amongst which of the following is the correct way in which an IoT device is associated with the data?

1. LAN
2. Internet
3. Cables
4. Cloud

Answer: D) Cloud

Explanation:

An IoT device is associate with the data using the cloud-based services.

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