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WGU D337 INTERNET OF THINGS AND INFRASTRUCTURE
OBJECTIVE ASSESSMENT FINAL EXAM
COMPREHENSIVE PRACTICE QUESTIONS & DETAILED
ANSWERS (2026-27)
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
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
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
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
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
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
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
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
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
Answer: B
WGU D337 INTERNET OF THINGS AND INFRASTRUCTURE
OBJECTIVE ASSESSMENT FINAL EXAM
COMPREHENSIVE PRACTICE QUESTIONS & DETAILED
ANSWERS (2026-27)
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
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
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
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
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
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
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
, 4|Page
B. QoS 1
C. QoS 2
D. QoS 3
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
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
Answer: B
