Smart Devices and IoT (Internet of Things) MCQs

1. : What does IoT stand for in technology?
(A) Internet of Telecommunication
(B) Internet of Tasks
(C) Internet of Things
(D) Internet of Technology

2. : Which of the following is a key component of IoT architecture?
(A) Data Link Layer
(B) Sensors and Actuators
(C) Control Panel
(D) Hard Disk

3. : Which protocol is commonly used in IoT for lightweight messaging?
(A) HTTP
(B) FTP
(C) MQTT
(D) SMTP

4. : Which communication technology is commonly used in smart home IoT devices?
(A) USB
(B) Zigbee
(C) HDMI
(D) VGA

5. : What type of IP address is most commonly used in IoT?
(A) IPv4
(B) MAC
(C) IPv6
(D) DNS

6. : What is a smart thermostat an example of?
(A) Wearable device
(B) Industrial IoT
(C) Smart home device
(D) Vehicle tracking

7. : Which of these is an application of IoT in agriculture?
(A) Smart grid
(B) Precision farming
(C) Smart lighting
(D) Smart factory

8. : What is the function of actuators in IoT?
(A) Store data
(B) Measure data
(C) Perform actions
(D) Connect to Wi-Fi

9. : Which of the following is a wearable IoT device?
(A) Smartwatch
(B) Smart refrigerator
(C) Smart TV
(D) Smart door lock

10. : What is the role of edge computing in IoT?
(A) Data transmission
(B) Local data processing
(C) Cloud storage
(D) User interface

11. : Which cloud platform offers IoT services?
(A) Microsoft Azure
(B) Adobe Creative Cloud
(C) Dropbox
(D) WhatsApp

12. : Which of these can be part of a smart city IoT solution?
(A) Smart parking
(B) Smart fans
(C) Smart plugs
(D) Smart fridge

13. : IoT devices usually communicate using which kind of networks?
(A) Satellite TV
(B) Cellular, Wi-Fi, or LPWAN
(C) LAN cables
(D) Optical drives

14. : In IoT, what does a gateway do?
(A) Controls smart home lights
(B) Connects devices to the internet
(C) Measures temperature
(D) Sends SMS alerts

15. : Which language is widely used in programming IoT devices?
(A) HTML
(B) PHP
(C) Python
(D) SQL

16. : What does a smart meter measure?
(A) Temperature
(B) Electricity or gas usage
(C) Internet speed
(D) Car speed

17. : What is the benefit of using LPWAN in IoT?
(A) High bandwidth
(B) Shorter range
(C) Low power consumption
(D) High temperature resistance

18. : Which of these is a potential risk in IoT networks?
(A) Overheating
(B) Lack of RAM
(C) Security vulnerabilities
(D) Lack of screen

19. : What is an example of industrial IoT (IIoT)?
(A) Smart speaker
(B) Smart wristband
(C) Predictive maintenance sensor
(D) Smart bulb

20. : What is the main purpose of IoT analytics?
(A) Design interfaces
(B) Analyze and optimize operations
(C) Build apps
(D) Generate audio

21. : Which technology allows devices to be embedded with sensors and connectivity?
(A) Microcontrollers
(B) Internet cables
(C) IoT
(D) Circuit boards

22. : Which protocol is NOT typically used in IoT?
(A) CoAP
(B) MQTT
(C) HTTP
(D) IMAP

23. : What does the term “smart” mean in smart devices?
(A) High speed
(B) High cost
(C) Internet-connected and programmable
(D) Preloaded with videos

24. : What is the core idea behind IoT?
(A) Artificial intelligence
(B) Automating user interfaces
(C) Interconnecting everyday objects
(D) Increasing internet speed

25. : What kind of device is an Amazon Echo?
(A) Wearable
(B) Smart speaker
(C) Smart fridge
(D) Smart meter

26. : What sensor is commonly used in a smart weather station?
(A) Gas sensor
(B) Accelerometer
(C) Humidity sensor
(D) Light sensor

27. : Which standard is used for short-range wireless communication in IoT?
(A) Bluetooth
(B) HDMI
(C) SATA
(D) USB

28. : What does RFID stand for in IoT context?
(A) Radio Frequency Identification
(B) Remote File Input Device
(C) Random Function Internet Device
(D) Real Frequency Internet Data

29. : What is the function of a smart plug?
(A) Speed up internet
(B) Control power supply remotely
(C) Boost battery
(D) Measure weight

30. : Which of the following is a potential application of IoT in healthcare?
(A) Smart lamp
(B) Fitness tracker
(C) Smart oven
(D) Smart socket

31. : Which one of the following is a popular open-source IoT platform?
(A) Android Studio
(B) Node-RED
(C) Adobe Illustrator
(D) Visual Studio Code

32. : What is a disadvantage of using IoT devices?
(A) Faster communication
(B) High energy efficiency
(C) Potential privacy invasion
(D) Cost reduction

33. : What is the function of a sensor in IoT?
(A) Store data
(B) Send data packets
(C) Detect physical changes
(D) Charge the device

34. : Which type of network does NB-IoT belong to?
(A) Bluetooth
(B) LPWAN
(C) Zigbee
(D) LoRaWAN

35. : What is used to uniquely identify IoT devices on a network?
(A) IP address
(B) URL
(C) Protocol
(D) Username

36. : What kind of data does a smart fitness band collect?
(A) Financial data
(B) Biometric data
(C) Marketing data
(D) Storage usage

37. : Which technology allows machines to communicate without human involvement?
(A) M2M
(B) USB
(C) HTTP
(D) LAN

38. : What is the main goal of a smart grid?
(A) High internet speed
(B) Efficient power management
(C) Smart traffic lights
(D) Smart parking

39. : What does a gyroscope sensor detect in a smart device?
(A) Temperature
(B) Humidity
(C) Orientation and rotation
(D) Location

40. : What is the function of firmware in IoT devices?
(A) Network hosting
(B) UI rendering
(C) Control device hardware
(D) Internet routing

41. : Which of these is NOT a common IoT communication protocol?
(A) CoAP
(B) MQTT
(C) SMTP
(D) LoRa

42. : What does “interoperability” refer to in IoT?
(A) Battery backup
(B) Device-to-device compatibility
(C) High storage
(D) User interface

43. : What kind of IoT system is used for traffic control in cities?
(A) Smart agriculture
(B) Smart transport
(C) Smart kitchen
(D) Smart healthcare

44. : What is a drawback of IoT in terms of network?
(A) Large memory
(B) Real-time updates
(C) Network congestion
(D) Inter-device messaging

45. : What role does AI play in IoT?
(A) Network speed booster
(B) Real-time decision making
(C) Replacing sensors
(D) Limiting data

46. : What is the main characteristic of smart devices?
(A) They are waterproof
(B) They work without internet
(C) They have connectivity and intelligence
(D) They are voice-controlled only

47. : What does “context awareness” in IoT mean?
(A) Data syncing
(B) Understanding surroundings and reacting accordingly
(C) Software updates
(D) Voice recognition

48. : What is the full form of CoAP?
(A) Control over Application Protocol
(B) Constrained Application Protocol
(C) Compact Application Port
(D) Controlled Access Protocol

49. : What is a key driver of IoT growth?
(A) Decreasing battery life
(B) Lower hardware costs
(C) Network delays
(D) Lack of standards

50. : Which sector is NOT directly related to IoT implementation?
(A) Agriculture
(B) Healthcare
(C) Fashion shows
(D) Smart homes