iot o level mcq chapter wise

Preparing for the NIELIT O Level IoT exam? This guide brings you the most comprehensive collection of IoT O Level MCQ Chapter Wise to help you master each topic step-by-step. Whether you’re focusing on IoT architecture, sensors, cloud platforms, or security, these chapter-wise multiple choice questions will boost your understanding and increase your chances of scoring high in the July 2025 exam. Practice regularly with these MCQs and stay ahead in your O Level preparation journey.

✅ Chapter 1: Introduction to IoT

1. IoT stands for:

   • a) Internet of Telecommunication

   • b) Internal of Technology

   • c) Internet of Things

   • d) Information of Technology
     Answer: c

2. Which of the following is NOT an IoT enabling technology?

   • a) Cloud Computing

   • b) Big Data

   • c) Wi-Fi

   • d) Photoshop
     Answer: d

3. The first application of IoT was:

   • a) Smart Car

   • b) Smart Fridge

   • c) Coke Machine

   • d) Smartwatch
     Answer: c

4. The key characteristics of IoT include:

   • a) Automation

   • b) Connectivity

   • c) Scalability

   • d) All of the above
     Answer: d

5. Which of the following best describes the goal of IoT?

   • a) Enhancing mobile applications

   • b) Connecting physical devices to the internet

   • c) Making websites faster

   • d) Designing new operating systems
     Answer: b

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✅ Chapter 2: Architecture of IoT

6. The basic architecture of IoT has how many layers?

   • a) 2

   • b) 3

   • c) 4

   • d) 5
     Answer: b

7. Which layer is responsible for sensing and collecting data in IoT?

   • a) Network layer

   • b) Perception layer

   • c) Application layer

   • d) Transport layer
     Answer: b

8. The application layer in IoT is responsible for:

   • a) Network routing

   • b) User interface and services

   • c) Sensor control

   • d) Authentication
     Answer: b

9. In IoT architecture, which layer handles transmission of data?

   • a) Application

   • b) Perception

   • c) Network

   • d) Presentation
     Answer: c

10. Which of the following is not part of the IoT architecture?

• a) Network

• b) Database

• c) Perception

• d) Application
  Answer: b

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✅ Chapter 3: IoT Devices and Sensors

11. Which of the following is an example of a sensor?

• a) Raspberry Pi

• b) LDR

• c) Router

• d) Switch
  Answer: b

12. A DHT11 sensor is used to measure:

• a) Speed

• b) Humidity and Temperature

• c) Light

• d) Pressure
  Answer: b

13. What is the function of an actuator in IoT?

• a) Collect data

• b) Store data

• c) Respond to sensor data

• d) Send emails
  Answer: c

14. Which sensor is used to detect motion?

• a) PIR sensor

• b) DHT11

• c) IR sensor

• d) GPS
  Answer: a

15. The role of a microcontroller in IoT is to:

• a) Connect to the internet

• b) Control sensors and actuators

• c) Design user interfaces

• d) Manage cloud data
  Answer: b

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✅ Chapter 4: Communication Protocols

16. Which communication protocol is best for short-range communication in IoT?

• a) MQTT

• b) Bluetooth

• c) HTTP

• d) SMTP
  Answer: b

17. Zigbee is based on which IEEE standard?

• a) 802.11

• b) 802.3

• c) 802.15.4

• d) 802.16
  Answer: c

18. What does MQTT stand for?

• a) Message Queue Telemetry Transport

• b) Medium Quality Transmission

• c) Multi Queue Telemetry Tool

• d) Message Quick Transport Technique
  Answer: a

19. CoAP protocol works on which model?

• a) Peer-to-peer

• b) Publisher-subscriber

• c) Request-response

• d) All of the above
  Answer: c

20. Which protocol is more suitable for resource-constrained IoT devices?

• a) HTTP

• b) CoAP

• c) FTP

• d) SSH
  Answer: b

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✅ Chapter 5: IoT Platforms and Cloud Computing

21. Which of the following is a popular cloud platform for IoT?

• a) Google Drive

• b) Microsoft Azure

• c) WordPress

• d) CorelDRAW
  Answer: b

22. ThingSpeak is mainly used for:

• a) Video Editing

• b) Real-time IoT data visualization

• c) Game Development

• d) Circuit Design
  Answer: b

23. AWS IoT Core is offered by:

• a) Microsoft

• b) Google

• c) Amazon

• d) IBM
  Answer: c

24. Which of the following is not a feature of cloud computing in IoT?

• a) Data storage

• b) Real-time monitoring

• c) Local-only computing

• d) Scalability
  Answer: c

25. The acronym PaaS stands for:

• a) Platform as a Software

• b) Platform as a Service

• c) Performance as a Solution

• d) Platform and Services
  Answer: b

26. Which service model is most suitable for developers building IoT apps?

• a) IaaS

• b) PaaS

• c) SaaS

• d) DaaS
  Answer: b

27. Cloud computing helps IoT by providing:

• a) Physical storage

• b) Static connectivity

• c) Elastic resources

• d) Manual backups
  Answer: c

28. Which of the following is a cloud-based IoT platform?

• a) Arduino IDE

• b) ThingSpeak

• c) Windows XP

• d) Notepad++
  Answer: b

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✅ Chapter 6: Security and Privacy in IoT

29. The biggest challenge in IoT is:

• a) Programming languages

• b) Cost of devices

• c) Security

• d) Electricity
  Answer: c

30. Which of the following is a type of IoT attack?

• a) DDoS

• b) SQL Injection

• c) Man-in-the-middle

• d) All of the above
  Answer: d

31. What is the full form of DDoS?

• a) Direct Denial of Services

• b) Distributed Denial of Service

• c) Distributed Domain over Server

• d) Dual Denial of System
  Answer: b

32. Which technology helps in securing IoT communication?

• a) Encryption

• b) VPN

• c) Authentication

• d) All of the above
  Answer: d

33. In IoT, device authentication ensures:

• a) Device identity is verified

• b) More sensors can be added

• c) Devices work faster

• d) Devices charge quickly
  Answer: a

34. Which of the following is used for data encryption in IoT?

• a) AES

• b) PNG

• c) XML

• d) SMTP
  Answer: a

35. A weak password in an IoT system can lead to:

• a) Better performance

• b) High energy usage

• c) System hacking

• d) Lower latency
  Answer: c

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✅ Chapter 7: IoT Applications

36. IoT is widely used in:

• a) Smart Homes

• b) Smart Cities

• c) Healthcare

• d) All of the above
  Answer: d

37. Which of the following is a wearable IoT device?

• a) Smartwatch

• b) Smart TV

• c) Smart Fridge

• d) All of the above
  Answer: a

38. Smart agriculture uses IoT for:

• a) Monitoring crop health

• b) Traffic control

• c) Social media tracking

• d) Online exams
  Answer: a

39. A Smart Grid is used for:

• a) Managing traffic

• b) Smart irrigation

• c) Efficient energy distribution

• d) Water purification
  Answer: c

40. Which of the following is an example of industrial IoT?

• a) Fitbit

• b) Smart irrigation

• c) Smart Meter

• d) Predictive maintenance of machines
  Answer: d

41. IoT in healthcare can be used to:

• a) Send emails

• b) Monitor patient vitals remotely

• c) Print prescriptions

• d) Manage accounts
  Answer: b

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✅ Chapter 8: Hands-on (Microcontrollers, Raspberry Pi, Arduino)

42. Which of the following is a microcontroller board?

• a) Arduino

• b) Intel Core i5

• c) SSD

• d) GPU
  Answer: a

43. Raspberry Pi runs on:

• a) Windows

• b) Linux

• c) Mac

• d) Android
  Answer: b

44. GPIO stands for:

• a) General Purpose Input Output

• b) General Power Integrated Output

• c) Graphics Processor Input Output

• d) General Port Input Output
  Answer: a

45. Which language is commonly used in Raspberry Pi?

• a) Python

• b) Java

• c) Swift

• d) PHP
  Answer: a

46. Which IDE is used to program Arduino?

• a) NetBeans

• b) Android Studio

• c) Arduino IDE

• d) MATLAB
  Answer: c

47. The extension of Arduino code files is:

• a) .exe

• b) .cpp

• c) .ino

• d) .hex
  Answer: c

48. Which pin on the Arduino provides 5V output?

• a) GND

• b) VCC

• c) 5V

• d) RX
  Answer: c

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