IoT (Internet of Things) Technician Practice
Exam Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
Question 1
What is the primary purpose of IoT technology?
A. To replace all human jobs
B. To connect physical devices to the internet for data exchange
C. To eliminate the need for electricity
D. To build standalone offline systems
Rationale: IoT enables devices to collect and share data over networks
for monitoring and automation.
Question 2
Which protocol is commonly used in low-power IoT communication?
A. HTTP
B. FTP
C. MQTT
D. SMTP
Rationale: MQTT is lightweight and designed for low-bandwidth IoT
environments.
,Question 3
What does a sensor in an IoT system do?
A. Stores cloud data
B. Processes video streams
C. Collects environmental or physical data
D. Encrypts network traffic
Rationale: Sensors detect real-world conditions like temperature,
motion, or humidity.
Question 4
Which device is typically considered an IoT actuator?
A. Thermometer
B. Camera
C. Smart valve controller
D. Data server
Rationale: Actuators perform physical actions such as opening valves or
switching motors.
Question 5
What is edge computing in IoT?
A. Central cloud storage
B. Data encryption method
C. Processing data near the source device
D. Wireless signal boosting
Rationale: Edge computing reduces latency by processing data locally.
,Question 6
Which wireless technology is most common for short-range IoT
networks?
A. LTE
B. Ethernet
C. Bluetooth Low Energy (BLE)
D. Fiber optic
Rationale: BLE is energy-efficient and ideal for short-range device
communication.
Question 7
What is the role of a gateway in IoT systems?
A. Store backup files
B. Provide electricity
C. Connect IoT devices to the internet or cloud
D. Replace sensors
Rationale: Gateways act as bridges between local devices and cloud
networks.
Question 8
Which cloud model is most used for IoT platforms?
A. SaaS only
B. IaaS only
C. PaaS and IoT cloud services
, D. Offline storage systems
Rationale: PaaS supports IoT application development and deployment.
Question 9
What does MQTT stand for?
A. Multi-Queue Transfer Tool
B. Message Queuing Telemetry Transport
C. Machine Query Transmission Terminal
D. Managed Quality Telemetry Tool
Rationale: MQTT is a lightweight messaging protocol for IoT devices.
Question 10
Which is a common IoT security risk?
A. High bandwidth
B. Weak device authentication
C. Excess storage
D. Fast processors
Rationale: Poor authentication allows unauthorized device access.
Question 11
What is a smart thermostat an example of?
A. Industrial robot
B. IoT device
C. Cloud server
D. Network switch
Exam Questions With Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
Question 1
What is the primary purpose of IoT technology?
A. To replace all human jobs
B. To connect physical devices to the internet for data exchange
C. To eliminate the need for electricity
D. To build standalone offline systems
Rationale: IoT enables devices to collect and share data over networks
for monitoring and automation.
Question 2
Which protocol is commonly used in low-power IoT communication?
A. HTTP
B. FTP
C. MQTT
D. SMTP
Rationale: MQTT is lightweight and designed for low-bandwidth IoT
environments.
,Question 3
What does a sensor in an IoT system do?
A. Stores cloud data
B. Processes video streams
C. Collects environmental or physical data
D. Encrypts network traffic
Rationale: Sensors detect real-world conditions like temperature,
motion, or humidity.
Question 4
Which device is typically considered an IoT actuator?
A. Thermometer
B. Camera
C. Smart valve controller
D. Data server
Rationale: Actuators perform physical actions such as opening valves or
switching motors.
Question 5
What is edge computing in IoT?
A. Central cloud storage
B. Data encryption method
C. Processing data near the source device
D. Wireless signal boosting
Rationale: Edge computing reduces latency by processing data locally.
,Question 6
Which wireless technology is most common for short-range IoT
networks?
A. LTE
B. Ethernet
C. Bluetooth Low Energy (BLE)
D. Fiber optic
Rationale: BLE is energy-efficient and ideal for short-range device
communication.
Question 7
What is the role of a gateway in IoT systems?
A. Store backup files
B. Provide electricity
C. Connect IoT devices to the internet or cloud
D. Replace sensors
Rationale: Gateways act as bridges between local devices and cloud
networks.
Question 8
Which cloud model is most used for IoT platforms?
A. SaaS only
B. IaaS only
C. PaaS and IoT cloud services
, D. Offline storage systems
Rationale: PaaS supports IoT application development and deployment.
Question 9
What does MQTT stand for?
A. Multi-Queue Transfer Tool
B. Message Queuing Telemetry Transport
C. Machine Query Transmission Terminal
D. Managed Quality Telemetry Tool
Rationale: MQTT is a lightweight messaging protocol for IoT devices.
Question 10
Which is a common IoT security risk?
A. High bandwidth
B. Weak device authentication
C. Excess storage
D. Fast processors
Rationale: Poor authentication allows unauthorized device access.
Question 11
What is a smart thermostat an example of?
A. Industrial robot
B. IoT device
C. Cloud server
D. Network switch
