DEX IOT DAY 1 TEST QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2027 Q&A | INSTANT
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1. What does IoT stand for?
A. Internet of Technology
B. Integration of Telecommunications
C. Internet of Things
D. Information of Technology
Answer: C. Internet of Things
Rationale: The Internet of Things (IoT) refers to a network of physical
objects embedded with sensors, software, processing capabilities, and
connectivity that allow them to collect and exchange data. The other
options do not represent the standard meaning of IoT.
2. What is the primary purpose of an IoT sensor?
A. To store application software
B. To detect and measure physical conditions
,C. To replace a network router
D. To encrypt every network packet
Answer: B. To detect and measure physical conditions
Rationale: Sensors collect information about conditions such as
temperature, pressure, motion, humidity, light, or vibration. That
information can then be processed or transmitted for monitoring and
decision-making.
3. Which component allows an IoT device to communicate with
another device or network?
A. Connectivity module
B. Mechanical housing
C. Battery enclosure
D. Heat sink
Answer: A. Connectivity module
Rationale: A connectivity module provides communication capabilities
through technologies such as Wi-Fi, Bluetooth, cellular networks,
Zigbee, Ethernet, or other protocols. Physical housing and heat sinks do
not provide network communication.
4. Which of the following is an example of an IoT device?
,A. Traditional paper notebook
B. Smart thermostat connected to a network
C. Standard screwdriver
D. Unconnected mechanical switch
Answer: B. Smart thermostat connected to a network
Rationale: A network-connected smart thermostat can sense
environmental conditions, exchange data, and potentially receive
commands remotely, making it an IoT device.
5. What is the role of an actuator in an IoT system?
A. It measures environmental conditions
B. It performs a physical action based on a command
C. It permanently stores historical data
D. It creates user passwords
Answer: B. It performs a physical action based on a command
Rationale: Actuators convert electrical or digital commands into physical
actions, such as opening a valve, moving a motor, turning on a light, or
adjusting a mechanism.
6. Which component typically collects data from sensors and may
process that data before sending it onward?
, A. IoT edge device
B. Keyboard
C. Printer cartridge
D. Passive cable
Answer: A. IoT edge device
Rationale: Edge devices can collect, filter, analyze, and process data
close to where it is generated. This can reduce latency and decrease the
amount of information that must be transmitted to centralized systems.
7. What is meant by “edge computing” in IoT?
A. Processing data only at a distant data center
B. Processing data close to where it is generated
C. Eliminating all sensors
D. Disconnecting devices from networks
Answer: B. Processing data close to where it is generated
Rationale: Edge computing moves some processing closer to IoT devices
and data sources. This can improve response time, reduce bandwidth
requirements, and support applications that require rapid decisions.
8. Which protocol is commonly associated with lightweight IoT
messaging?
CORRECT ANSWERS (VERIFIED ANSWERS)
PLUS RATIONALES 2027 Q&A | INSTANT
DOWNLOAD PDF
1. What does IoT stand for?
A. Internet of Technology
B. Integration of Telecommunications
C. Internet of Things
D. Information of Technology
Answer: C. Internet of Things
Rationale: The Internet of Things (IoT) refers to a network of physical
objects embedded with sensors, software, processing capabilities, and
connectivity that allow them to collect and exchange data. The other
options do not represent the standard meaning of IoT.
2. What is the primary purpose of an IoT sensor?
A. To store application software
B. To detect and measure physical conditions
,C. To replace a network router
D. To encrypt every network packet
Answer: B. To detect and measure physical conditions
Rationale: Sensors collect information about conditions such as
temperature, pressure, motion, humidity, light, or vibration. That
information can then be processed or transmitted for monitoring and
decision-making.
3. Which component allows an IoT device to communicate with
another device or network?
A. Connectivity module
B. Mechanical housing
C. Battery enclosure
D. Heat sink
Answer: A. Connectivity module
Rationale: A connectivity module provides communication capabilities
through technologies such as Wi-Fi, Bluetooth, cellular networks,
Zigbee, Ethernet, or other protocols. Physical housing and heat sinks do
not provide network communication.
4. Which of the following is an example of an IoT device?
,A. Traditional paper notebook
B. Smart thermostat connected to a network
C. Standard screwdriver
D. Unconnected mechanical switch
Answer: B. Smart thermostat connected to a network
Rationale: A network-connected smart thermostat can sense
environmental conditions, exchange data, and potentially receive
commands remotely, making it an IoT device.
5. What is the role of an actuator in an IoT system?
A. It measures environmental conditions
B. It performs a physical action based on a command
C. It permanently stores historical data
D. It creates user passwords
Answer: B. It performs a physical action based on a command
Rationale: Actuators convert electrical or digital commands into physical
actions, such as opening a valve, moving a motor, turning on a light, or
adjusting a mechanism.
6. Which component typically collects data from sensors and may
process that data before sending it onward?
, A. IoT edge device
B. Keyboard
C. Printer cartridge
D. Passive cable
Answer: A. IoT edge device
Rationale: Edge devices can collect, filter, analyze, and process data
close to where it is generated. This can reduce latency and decrease the
amount of information that must be transmitted to centralized systems.
7. What is meant by “edge computing” in IoT?
A. Processing data only at a distant data center
B. Processing data close to where it is generated
C. Eliminating all sensors
D. Disconnecting devices from networks
Answer: B. Processing data close to where it is generated
Rationale: Edge computing moves some processing closer to IoT devices
and data sources. This can improve response time, reduce bandwidth
requirements, and support applications that require rapid decisions.
8. Which protocol is commonly associated with lightweight IoT
messaging?
