Development and Testing ITP-110 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A manufacturing plant is integrating a new vibration sensor into its predictive-maintenance system. The sensor publishes data via MQTT to a broker, and a separate analytics service subscribes to the topic. During integration testing, the analytics service receives messages but the timestamps are in UTC while the plant's maintenance dashboard expects local time. What is the BEST way to resolve this?

   • AStandardize on UTC in the sensor payload and convert to local time in the dashboard presentation layer.
   • BConfigure the sensor to send timestamps in the plant's local timezone.
   • CHave the analytics service ignore the timestamp and use the broker's arrival time.
   • DChange the dashboard to display UTC and train the maintenance staff to read it.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   In the development phase of an IoT project, which activity is primarily associated with the 'connectivity' component?

   • AWriting the embedded code that reads sensor data
   • BDesigning the physical enclosure for the device
   • CCreating the user interface for the mobile application
   • DSelecting and configuring the communication protocol (e.g., MQTT, CoAP) for data transmission
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4. 8application · medium

   A smart-building startup is developing a wireless occupancy sensor that uses a coin-cell battery. The hardware team has selected a microcontroller and a PIR sensor. The firmware team is writing the code that reads the sensor and transmits data. Which design decision during the development phase would MOST directly extend the device's battery life?

   • AAdd an external watchdog timer to reset the microcontroller periodically.
   • BUse a higher-resolution ADC to sample the PIR sensor more precisely.
   • CIncrease the radio transmit power to ensure a stronger signal to the gateway.
   • DImplement a deep-sleep mode that wakes the microcontroller only when the PIR sensor detects motion.
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A building-automation company is integrating a new BACnet-based HVAC controller with an existing IoT platform that uses MQTT. The HVAC controller only supports BACnet/IP, and the IoT platform only accepts MQTT. The team needs to enable communication between the two systems. Which integration approach is MOST appropriate?

   • ADeploy a protocol gateway that translates between BACnet/IP and MQTT, mapping BACnet objects to MQTT topics.
   • BModify the IoT platform to natively parse BACnet/IP packets.
   • CUse a serial-to-Ethernet converter to connect the HVAC controller directly to the IoT platform.
   • DReplace the HVAC controller with one that natively supports MQTT.
   Reveal Solution Discussion Select an answer first
6. 10application · medium

   A wearable-device company is developing a fitness tracker that syncs with a smartphone app. The tracker uses Bluetooth Low Energy (BLE). During development, the team needs to ensure the app can reliably reconnect to the tracker when the user walks out of range and then comes back. Which development practice is MOST important to implement?

   • AUse a proprietary RF protocol instead of BLE to avoid connection drops.
   • BRequire the user to manually re-pair the device each time the connection is lost.
   • CImplement a reconnection state machine in the app that handles connection loss and re-establishment gracefully.
   • DIncrease the BLE transmit power on the tracker to extend the range.
   Reveal Solution Discussion Select an answer first