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WGU D337 OA Final Exam| Internet Of Things And
Infrastructure Objective Assessment Final Exam (2025/2026)
Complete Questions And Correct Verified Answers
A company is deploying IoT sensors to monitor factory equipment health across
multiple sites. Which technology ensures data can be processed locally for faster
insights, reduced latency, and lower reliance on centralized cloud servers?
A. Edge computing
B. Load balancing
C. Fog networking
D. Content delivery network
Correct Answer: A
An agricultural project integrates IoT soil sensors and automated irrigation. Which
communication protocol is best suited for low-power, long-range transmission in
rural areas where Wi-Fi coverage is limited?
A. Zigbee
B. LoRaWAN
C. Bluetooth
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D. Ethernet
Correct Answer: B
A hospital uses IoT devices to continuously stream patient vital signs. Which
component ensures reliable routing of messages between devices and clinical
systems while maintaining scalability and low latency?
A. REST API
B. MQTT broker
C. Blockchain ledger
D. FTP server
Correct Answer: B
An IoT home automation system collects both structured and unstructured data.
Which storage solution is most suitable for handling large-scale unstructured IoT
data such as video feeds?
A. Relational database
B. Data warehouse
C. NoSQL database
D. CSV flat files
Correct Answer: C
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A logistics company uses IoT to track delivery trucks. Which cloud service model
provides infrastructure such as servers, networking, and storage while allowing the
company to deploy its own IoT applications?
A. SaaS
B. IaaS
C. PaaS
D. DBaaS
Correct Answer: B
An IoT-enabled city project deploys thousands of streetlight sensors. Which
network type best supports short-range, low-power communication between these
devices?
A. Cellular LTE
B. Zigbee mesh
C. Fiber optic backbone
D. Ethernet LAN
Correct Answer: B
An IoT platform must ensure messages are delivered even if a device temporarily
loses connectivity. Which MQTT quality of service level guarantees delivery
exactly once without duplication?
A. QoS 0
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B. QoS 1
C. QoS 2
D. QoS 3
Correct Answer: C
IoT gateways play a vital role in many architectures. Which function is the most
critical for gateways in IoT systems?
A. Providing long-term data storage
B. Translating device protocols and aggregating data
C. Managing billing systems
D. Offering machine learning predictions
Correct Answer: B
A smart retail environment deploys IoT beacons for customer tracking. Which
short-range technology is most often used for these beacons to interact with
smartphones?
A. RFID
B. Bluetooth Low Energy
C. Wi-Fi Direct
D. NFC
Correct Answer: B
WGU D337 OA Final Exam| Internet Of Things And
Infrastructure Objective Assessment Final Exam (2025/2026)
Complete Questions And Correct Verified Answers
A company is deploying IoT sensors to monitor factory equipment health across
multiple sites. Which technology ensures data can be processed locally for faster
insights, reduced latency, and lower reliance on centralized cloud servers?
A. Edge computing
B. Load balancing
C. Fog networking
D. Content delivery network
Correct Answer: A
An agricultural project integrates IoT soil sensors and automated irrigation. Which
communication protocol is best suited for low-power, long-range transmission in
rural areas where Wi-Fi coverage is limited?
A. Zigbee
B. LoRaWAN
C. Bluetooth
,2|Page
D. Ethernet
Correct Answer: B
A hospital uses IoT devices to continuously stream patient vital signs. Which
component ensures reliable routing of messages between devices and clinical
systems while maintaining scalability and low latency?
A. REST API
B. MQTT broker
C. Blockchain ledger
D. FTP server
Correct Answer: B
An IoT home automation system collects both structured and unstructured data.
Which storage solution is most suitable for handling large-scale unstructured IoT
data such as video feeds?
A. Relational database
B. Data warehouse
C. NoSQL database
D. CSV flat files
Correct Answer: C
,3|Page
A logistics company uses IoT to track delivery trucks. Which cloud service model
provides infrastructure such as servers, networking, and storage while allowing the
company to deploy its own IoT applications?
A. SaaS
B. IaaS
C. PaaS
D. DBaaS
Correct Answer: B
An IoT-enabled city project deploys thousands of streetlight sensors. Which
network type best supports short-range, low-power communication between these
devices?
A. Cellular LTE
B. Zigbee mesh
C. Fiber optic backbone
D. Ethernet LAN
Correct Answer: B
An IoT platform must ensure messages are delivered even if a device temporarily
loses connectivity. Which MQTT quality of service level guarantees delivery
exactly once without duplication?
A. QoS 0
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B. QoS 1
C. QoS 2
D. QoS 3
Correct Answer: C
IoT gateways play a vital role in many architectures. Which function is the most
critical for gateways in IoT systems?
A. Providing long-term data storage
B. Translating device protocols and aggregating data
C. Managing billing systems
D. Offering machine learning predictions
Correct Answer: B
A smart retail environment deploys IoT beacons for customer tracking. Which
short-range technology is most often used for these beacons to interact with
smartphones?
A. RFID
B. Bluetooth Low Energy
C. Wi-Fi Direct
D. NFC
Correct Answer: B
