Q.1 What is the primary purpose of the Internet of Things (IoT)?
To connect devices and enable data exchange
To improve web browsing speed
To develop desktop applications
To enhance video game graphics
Explanation - IoT focuses on connecting physical devices to the internet to collect and exchange data.
Correct answer is: To connect devices and enable data exchange
Q.2 Which communication protocol is commonly used in IoT devices for short-range connectivity?
HTTP
Bluetooth
FTP
SMTP
Explanation - Bluetooth is widely used in IoT devices for short-range wireless communication.
Correct answer is: Bluetooth
Q.3 Which of the following is a common IoT networking topology?
Star topology
Ring topology
Bus topology
Mesh topology
Explanation - IoT networks often use mesh topology to ensure device-to-device communication and redundancy.
Correct answer is: Mesh topology
Q.4 Which IoT protocol is designed specifically for constrained devices and low-power networks?
MQTT
HTTP
SMTP
Telnet
Explanation - MQTT is lightweight and optimized for devices with limited processing power and network bandwidth.
Correct answer is: MQTT
Q.5 In IoT, what is the role of a gateway?
Connect IoT devices to the cloud
Store data locally only
Run web servers
Host video streaming services
Explanation - Gateways aggregate data from IoT devices and forward it to cloud platforms for processing and storage.
Correct answer is: Connect IoT devices to the cloud
Q.6 Which IoT network technology is most suitable for long-range, low-power applications?
Wi-Fi
Zigbee
LoRaWAN
Ethernet
Explanation - LoRaWAN supports long-range communication with minimal energy consumption, ideal for IoT sensors.
Correct answer is: LoRaWAN
Q.7 Which of the following is an example of a cloud platform used in IoT?
AWS IoT
Microsoft Excel
Adobe Photoshop
MySQL
Explanation - AWS IoT provides cloud services to store, process, and manage IoT device data.
Correct answer is: AWS IoT
Q.8 What is a common security concern in IoT networking?
Unauthorized access to devices
Slow video rendering
Incorrect spell checking
Network cable faults
Explanation - IoT devices are often vulnerable to hacking, making device authentication and data encryption essential.
Correct answer is: Unauthorized access to devices
Q.9 Which layer in the IoT architecture is responsible for data processing?
Perception layer
Network layer
Application layer
Transport layer
Explanation - The application layer handles data analytics, user interfaces, and actionable insights in IoT systems.
Correct answer is: Application layer
Q.10 Which IoT communication protocol is designed to work over TCP/IP?
MQTT
Zigbee
Bluetooth
NFC
Explanation - MQTT operates over TCP/IP, making it suitable for internet-connected IoT devices.
Correct answer is: MQTT
Q.11 Which IoT device type is considered an actuator?
A smart light bulb
A temperature sensor
A motion detector
A humidity sensor
Explanation - Actuators perform actions based on received data, such as turning on a light or activating a motor.
Correct answer is: A smart light bulb
Q.12 Which IoT communication protocol is message queue-based?
MQTT
HTTP
FTP
SMTP
Explanation - MQTT uses a publish/subscribe messaging model suitable for IoT devices with limited bandwidth.
Correct answer is: MQTT
Q.13 Which type of IoT network is suitable for connecting devices in a smart home?
WPAN
WAN
MAN
SAN
Explanation - Wireless Personal Area Networks (WPAN) connect devices in a localized area like a home using protocols like Zigbee or Bluetooth.
Correct answer is: WPAN
Q.14 In IoT, what is the primary role of sensors?
To collect environmental or device data
To store data permanently
To display web pages
To execute cloud applications
Explanation - Sensors measure physical conditions such as temperature, motion, or light, providing input for IoT systems.
Correct answer is: To collect environmental or device data
Q.15 Which of the following is an example of an industrial IoT application?
Predictive maintenance in factories
Social media sharing
Mobile gaming
Video editing software
Explanation - Industrial IoT applies sensors and analytics to monitor machinery and prevent failures.
Correct answer is: Predictive maintenance in factories
Q.16 Which IoT network technology is primarily used in smart cities for low data rate communication?
LoRaWAN
Wi-Fi
Ethernet
5G mmWave
Explanation - LoRaWAN supports low-power, long-range communication ideal for smart city sensors like street lights and parking sensors.
Correct answer is: LoRaWAN
Q.17 Which feature of IoT devices makes them 'smart'?
Ability to sense, process, and communicate data
High-resolution display
Large storage capacity
Expensive hardware
Explanation - Smart IoT devices can sense the environment, process information, and communicate with other devices or the cloud.
Correct answer is: Ability to sense, process, and communicate data
Q.18 Which IoT protocol is lightweight and designed for constrained networks?
CoAP
HTTP
FTP
SMTP
Explanation - Constrained Application Protocol (CoAP) is designed for low-power devices and restricted networks.
Correct answer is: CoAP
Q.19 Which of these is an example of a wearable IoT device?
Smartwatch
Router
Laptop
3D printer
Explanation - Wearable IoT devices, like smartwatches, monitor and collect data on the user's activities or health.
Correct answer is: Smartwatch
Q.20 Which IoT technology is often used for vehicle-to-vehicle communication?
VANET
Zigbee
Bluetooth
Ethernet
Explanation - Vehicular Ad-Hoc Networks (VANETs) allow vehicles to communicate with each other for traffic management and safety.
Correct answer is: VANET
Q.21 What is the role of edge computing in IoT?
Processing data closer to the source
Storing all data in the cloud
Designing web pages
Enhancing graphics performance
Explanation - Edge computing reduces latency and bandwidth usage by analyzing data near the IoT devices instead of sending it all to the cloud.
Correct answer is: Processing data closer to the source
Q.22 Which IoT network type connects devices across cities or countries?
WAN
WPAN
LAN
PAN
Explanation - Wide Area Networks (WANs) connect devices over large geographical areas, suitable for city-wide IoT networks.
Correct answer is: WAN
Q.23 In IoT, what does 'interoperability' mean?
Different devices and systems working together seamlessly
Devices running out of battery quickly
Poor network connectivity
Limited device storage
Explanation - Interoperability ensures IoT devices from different manufacturers can communicate and operate effectively.
Correct answer is: Different devices and systems working together seamlessly
Q.24 Which of the following is a real-time IoT application?
Smart traffic light control
Video editing
Document formatting
Offline gaming
Explanation - Real-time IoT applications respond immediately to sensor data, such as adjusting traffic lights based on vehicle flow.
Correct answer is: Smart traffic light control
Q.25 Which IoT communication standard is most suitable for smart home lighting systems?
Zigbee
Ethernet
LTE
VLAN
Explanation - Zigbee provides low-power, short-range wireless communication suitable for home automation devices like smart bulbs.
Correct answer is: Zigbee