Which architecture element is closest to the physical world?
Correct Answer: D. Sensor and actuator layer
MCQ Collection
Internet of Things (IoT) MCQs
Internet of Things MCQs for students, university exams, smart devices, sensors, networks, and technology-related preparation.
Which is an important factor in IoT node placement?
Correct Answer: D. Coverage, connectivity, and power availability
In MQTT, a device that receives messages from a topic is called a:
Correct Answer: D. Subscriber
What does a transport layer provide in IoT communication?
Correct Answer: D. End-to-end communication services between applications
The network layer of IEEE 802.15.4-based IoT applications commonly supports:
Correct Answer: D. IP-based routing and packet delivery
Which protocol uses publish/subscribe instead of strict request/response?
Correct Answer: D. MQTT
Which is a key design requirement for IoT nodes?
Correct Answer: A. Small size, low power, and reliable connectivity
Which statement is true about IoT architecture?
Correct Answer: A. It must support communication between constrained devices and applications
MQTT-SN is especially useful for:
Correct Answer: A. Sensor networks and non-TCP/IP constrained environments
What is congestion control?
Correct Answer: A. Mechanisms to prevent or reduce overload in a network
Which layer maps most directly to user-visible IoT services?
Correct Answer: A. Application layer
Which term describes many different device types working in one IoT ecosystem?
Correct Answer: B. Heterogeneity