Internet of Things (IoT) MCQs

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1. What does IoT stand for? A) Internet of Telephones B) Internet of Things C) Internet of Theories D) Internet of Tricks Answer: B 2. Which of the following is NOT a characteristic of IoT? A) Interconnectivity B) Security C) Standardization D) Independence Answer: D 3. Which technology is commonly used for short-range communication in IoT devices? A) Bluetooth B) LTE C) WiMAX D) Zigbee Answer: A 4. Which layer of the IoT architecture handles device-to-device communication? A) Perception Layer B) Network Layer C) Application Layer D) Access Layer Answer: B 5. Which protocol is widely used for communication between IoT devices and cloud platforms? A) MQTT B) HTTP C) SMTP D) FTP Answer: A 6. Which IoT application is used for remotely controlling home appliances? A) IoT in Agriculture B) IoT in Healthcare C) Smart Home D) Industrial IoT (IIoT) Answer: C 7. What does RFID stand for in the context of IoT? A) Radio-Frequency Identification B) Remote File Interchange Data C) Real-time Frequency Interface Device D) Rapid Food Identification Answer: A 8. Which of the following is NOT a major challenge in IoT deployment? A) Security B) Standardization C) High initial cost D) Low energy consumption Answer: D 9. Which technology enables IoT devices to operate without human intervention? A) AI (Artificial Intelligence) B) AR (Augmented Reality) C) VR (Virtual Reality) D) MR (Mixed Reality) Answer: A 10. What is the main benefit of edge computing in IoT systems? A) Centralized control B) Reduced latency C) Lower initial cost D) Higher network bandwidth Answer: B 11. Which wireless technology is typically used for long-range communication in IoT applications? A) NFC (Near Field Communication) B) Zigbee C) LoRa (Long Range) D) Bluetooth Answer: C 12. Which of the following is a potential security threat to IoT devices? A) DDoS (Distributed Denial of Service) attacks B) SQL injection C) Buffer overflow D) All of the above Answer: D 13. Which IoT component processes data from sensors and actuators? A) Edge device B) Gateway C) Cloud server D) Actuator controller Answer: A 14. Which of the following is an example of wearable IoT technology? A) Smart thermostat B) Fitness tracker C) Smart fridge D) Home security camera Answer: B 15. Which IoT application focuses on optimizing agricultural processes? A) Smart grid B) Smart farming C) Smart city D) Smart transportation Answer: B 16. What is the primary function of a sensor in an IoT device? A) Process data B) Store data C) Collect data D) Transmit data Answer: C 17. Which of the following is NOT a benefit of IoT in healthcare? A) Remote patient monitoring B) Improved patient outcomes C) Higher healthcare costs D) Enhanced operational efficiency Answer: C 18. Which wireless technology is typically used for indoor, short-range communication between IoT devices? A) WiMAX B) Zigbee C) LTE D) LoRa Answer: B 19. What does BLE stand for in IoT technology? A) Bluetooth Low Energy B) Bluetooth Long Evolution C) Broadband Low Energy D) Basic Link Efficiency Answer: A 20. Which of the following is an example of an IoT-enabled smart city application? A) Smart meters B) Smart watches C) Smart refrigerators D) Smart headphones Answer: A 21. Which IoT component connects edge devices to the cloud? A) Sensor B) Gateway C) Actuator D) Protocol Answer: B 22. What is the main advantage of LPWAN (Low Power Wide Area Network) technologies in IoT? A) High data transfer rate B) Long battery life C) Short transmission range D) Large bandwidth Answer: B 23. Which of the following is NOT a typical use case of Industrial IoT (IIoT)? A) Predictive maintenance B) Smart grid management C) Smart home automation D) Asset tracking Answer: C 24. Which protocol is commonly used for device-to-device communication in IoT networks? A) HTTP B) CoAP (Constrained Application Protocol) C) FTP D) TCP/IP Answer: B 25. What is the purpose of MQTT (Message Queuing Telemetry Transport) in IoT? A) Real-time video streaming B) Secure data storage C) Machine-to-machine communication D) Social media integration Answer: C 26. Which IoT security measure ensures that only authorized devices can access a network? A) Encryption B) Authentication C) Firewall D) Intrusion Detection System (IDS) Answer: B 27. Which layer of the IoT architecture processes and analyzes data? A) Perception Layer B) Network Layer C) Application Layer D) Business Layer Answer: C 28. Which of the following is NOT a characteristic of edge computing in IoT? A) Reduced latency B) Centralized data processing C) Improved response time D) Lower bandwidth usage Answer: B 29. Which technology is used for real-time location tracking of assets in IoT? A) RFID B) Bluetooth C) NFC D) GPS (Global Positioning System) Answer: D 30. Which IoT application focuses on enhancing energy efficiency in buildings? A) Smart agriculture B) Smart transportation C) Smart grid D) Smart manufacturing Answer: C 31. Which of the following is a disadvantage of IoT in consumer electronics? A) Improved convenience B) Higher maintenance costs C) Enhanced user experience D) Increased connectivity Answer: B 32. Which technology allows IoT devices to communicate via electrical wiring? A) Ethernet B) Zigbee C) Power Line Communication (PLC) D) Bluetooth Answer: C 33. Which IoT component converts digital signals into physical actions? A) Sensor B) Actuator C) Gateway D) Protocol Answer: B 34. Which of the following is a major privacy concern in IoT deployment? A) Data encryption B) Data integrity C) Data availability D) Data collection and storage Answer: D 35. Which wireless technology is typically used for personal area networks (PANs) in IoT? A) Bluetooth B) Wi-Fi C) LTE D) Zigbee Answer: A 36. Which protocol is commonly used for controlling IoT devices over the web? A) FTP B) HTTP C) SMTP D) SNMP (Simple Network Management Protocol) Answer: B 37. What is the purpose of a gateway in IoT architecture? A) Data processing and analysis B) Secure data storage C) Device-to-cloud communication D) Real-time data visualization Answer: C 38. Which of the following is NOT a benefit of IoT in agriculture? A) Improved crop yield B) Reduced water consumption C) Increased labor costs D) Enhanced livestock management Answer: C 39. Which IoT application focuses on optimizing traffic flow and reducing congestion? A) Smart healthcare B) Smart transportation C) Smart retail D) Smart manufacturing Answer: B 40. What does CoAP stand for in IoT communication? A) Communication over Application Protocol B) Constrained Application Protocol C) Converged Application Protocol D) Cooperative Application Protocol Answer: B 41. Which technology is used for low-power, short-range wireless communication between IoT devices? A) Wi-Fi B) Zigbee C) LTE D) 5G Answer: B 42. Which IoT component manages the flow of data between edge devices and the cloud? A) Sensor B) Gateway C) Actuator D) Protocol Answer: B 43. Which protocol is commonly used for real-time data streaming in IoT applications? A) HTTP B) MQTT C) FTP D) SNMP Answer: B 44. What is the main advantage of fog computing in IoT systems? A) Centralized data processing B) Reduced latency C) Higher bandwidth usage D) Lower device compatibility Answer: B 45. Which IoT application focuses on enhancing safety and security in urban areas? A) Smart agriculture B) Smart city C) Smart grid D) Smart manufacturing Answer: B 46. Which technology is used for secure communication between IoT devices and cloud platforms? A) HTTP B) HTTPS (HTTP Secure) C) SMTP D) TCP/IP Answer: B 47. What is the main purpose of OTA (Over-the-Air) updates in IoT devices? A) Secure data storage B) Remote software updates C) Real-time data visualization D) Device-to-device communication Answer: B 48. Which IoT security measure protects data from unauthorized access? A) Data encryption B) Authentication C) Firewall D) Intrusion Detection System (IDS) Answer: A 49. Which wireless technology is typically used for medium-range communication in IoT applications? A) Wi-Fi B) Bluetooth C) Zigbee D) LTE Answer: D 50. Which of the following is an example of an IoT-enabled smart home device? A) Smart meter B) Fitness tracker C) Smart thermostat D) Industrial robot Answer: C

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