Q.1 What does IoT stand for in computer science?
Internet of Things
Internet of Technology
Interface of Things
Integration of Technology
Explanation - IoT stands for Internet of Things, which refers to the interconnection of everyday objects to the internet for sending and receiving data.
Correct answer is: Internet of Things
Q.2 Which of the following is NOT an example of an IoT device?
Smart thermostat
Fitness tracker
Washing machine
Desktop calculator
Explanation - IoT devices are connected to the internet and can exchange data. A desktop calculator has no connectivity or data exchange capabilities.
Correct answer is: Desktop calculator
Q.3 Which protocol is commonly used for IoT device communication?
HTTP
MQTT
FTP
SMTP
Explanation - MQTT (Message Queuing Telemetry Transport) is a lightweight messaging protocol widely used in IoT for efficient data exchange between devices.
Correct answer is: MQTT
Q.4 In IoT, what does 'actuator' refer to?
A device that senses data
A device that processes data
A device that performs an action
A device that stores data
Explanation - An actuator is a component in IoT that takes action based on signals from sensors or control systems, such as turning on a motor or opening a valve.
Correct answer is: A device that performs an action
Q.5 Which layer in IoT architecture is responsible for data processing and storage?
Perception layer
Network layer
Application layer
Edge/Processing layer
Explanation - The edge or processing layer in IoT architecture handles data computation, storage, and decision-making before sending it to the application layer.
Correct answer is: Edge/Processing layer
Q.6 Which of the following is a key benefit of IoT in smart cities?
Faster internet speed
Energy management and reduced wastage
More social media usage
Increased electricity bills
Explanation - IoT in smart cities helps optimize resource use, including energy, water, and transportation, improving efficiency and reducing wastage.
Correct answer is: Energy management and reduced wastage
Q.7 Which sensor type is commonly used in IoT for temperature monitoring?
Thermocouple sensor
Infrared sensor
Accelerometer
Proximity sensor
Explanation - Thermocouple sensors are widely used in IoT systems to measure temperature due to their accuracy and reliability.
Correct answer is: Thermocouple sensor
Q.8 In IoT, what is the main purpose of using cloud computing?
Local storage of all data
Remote processing, storage, and analytics of data
Replacing sensors
Replacing actuators
Explanation - Cloud computing enables IoT systems to store, process, and analyze large amounts of data remotely, providing scalability and accessibility.
Correct answer is: Remote processing, storage, and analytics of data
Q.9 Which technology ensures secure data transfer between IoT devices?
Blockchain
Bluetooth
Ethernet
HTML
Explanation - Blockchain provides a decentralized and secure way to record transactions and data exchanges between IoT devices, reducing security risks.
Correct answer is: Blockchain
Q.10 Which communication technology is widely used in IoT for short-range wireless connectivity?
Wi-Fi
NFC
Zigbee
All of the above
Explanation - Wi-Fi, NFC, and Zigbee are all short-range communication technologies used in IoT depending on the application requirements.
Correct answer is: All of the above
Q.11 Which type of IoT network connects devices over large geographical areas?
LAN
WAN
LPWAN
PAN
Explanation - LPWAN (Low-Power Wide-Area Network) is designed for long-range communication between IoT devices with low power consumption.
Correct answer is: LPWAN
Q.12 What role does 'edge computing' play in IoT?
Processing data close to the source to reduce latency
Storing all data in a central server
Replacing cloud servers
Increasing power consumption
Explanation - Edge computing processes IoT data locally, near the data source, which reduces latency and bandwidth usage compared to central cloud processing.
Correct answer is: Processing data close to the source to reduce latency
Q.13 Which of the following IoT applications is used in healthcare?
Smart meters
Wearable fitness trackers
Smart irrigation
Traffic monitoring sensors
Explanation - Wearable fitness trackers monitor health parameters like heart rate and steps, making them a popular IoT application in healthcare.
Correct answer is: Wearable fitness trackers
Q.14 Which IoT device is used in smart homes to control lighting remotely?
Smart bulb
Smart fridge
Smart TV
Smart thermostat
Explanation - Smart bulbs can be controlled remotely via apps or IoT platforms to adjust lighting according to user preferences.
Correct answer is: Smart bulb
Q.15 Which of the following is a challenge in IoT implementation?
High data security risks
Interoperability issues
Network connectivity problems
All of the above
Explanation - IoT faces multiple challenges including data security, compatibility between devices, and network connectivity limitations.
Correct answer is: All of the above
Q.16 What is the function of an IoT gateway?
Connects IoT devices to the cloud
Acts as a sensor
Stores data locally permanently
Controls actuators directly
Explanation - An IoT gateway serves as a bridge between IoT devices and cloud platforms, aggregating data and managing communication.
Correct answer is: Connects IoT devices to the cloud
Q.17 Which type of data do IoT sensors typically generate?
Structured data
Unstructured data
Both structured and unstructured data
Encrypted data only
Explanation - IoT sensors can produce structured data like temperature readings and unstructured data like images or audio.
Correct answer is: Both structured and unstructured data
Q.18 Which IoT communication standard is specifically designed for low-power devices?
Bluetooth Low Energy (BLE)
Wi-Fi
Ethernet
USB
Explanation - BLE is a wireless communication standard optimized for low-power, short-range IoT devices like fitness trackers and sensors.
Correct answer is: Bluetooth Low Energy (BLE)
Q.19 What is the main purpose of IoT in industrial applications (Industry 4.0)?
Entertainment
Automation, monitoring, and optimization of processes
Social networking
Personal communication
Explanation - In Industry 4.0, IoT is used to improve efficiency, safety, and productivity through automation and real-time monitoring.
Correct answer is: Automation, monitoring, and optimization of processes
Q.20 Which type of IoT device uses GPS for tracking location?
Smart thermostat
Vehicle tracker
Smart fridge
Wearable fitness tracker without GPS
Explanation - GPS-enabled IoT devices, like vehicle trackers, provide real-time location tracking and navigation information.
Correct answer is: Vehicle tracker
Q.21 Which of the following protocols is commonly used for IoT over constrained networks?
CoAP
HTTP
SMTP
FTP
Explanation - CoAP (Constrained Application Protocol) is a lightweight protocol designed for IoT devices in constrained environments with limited bandwidth.
Correct answer is: CoAP
Q.22 What is a primary advantage of using IoT in agriculture?
Improved crop monitoring and water management
Faster social media sharing
Enhanced video streaming
Increased pesticide usage
Explanation - IoT devices in agriculture help monitor soil moisture, crop health, and automate irrigation for efficient resource use.
Correct answer is: Improved crop monitoring and water management
Q.23 Which IoT technology is used for real-time data visualization and analytics?
Big Data and Cloud Platforms
Smart bulbs
Thermometers
Bluetooth devices
Explanation - Big Data analytics and cloud platforms process and visualize IoT data in real-time to provide insights and decision support.
Correct answer is: Big Data and Cloud Platforms
Q.24 Which layer of IoT architecture deals with user interface and applications?
Perception layer
Network layer
Application layer
Processing layer
Explanation - The application layer in IoT architecture provides services and interfaces to users, such as mobile apps or dashboards.
Correct answer is: Application layer
Q.25 Which of the following is a wearable IoT device?
Smartwatch
Smart fridge
Industrial sensor
Wi-Fi router
Explanation - Smartwatches are wearable IoT devices that monitor health, fitness, notifications, and other personal metrics.
Correct answer is: Smartwatch