Development and Testing ITP-110 Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A smart-agriculture company is testing a large deployment of soil sensors that report every 15 minutes. The sensors use a low-power wide-area network (LPWAN). During a pilot, the team finds that the gateway receives packets from the sensors but the cloud server only stores about 80% of them. The gateway logs show no errors. The network engineer suspects packet loss on the backhaul link between the gateway and the cloud. Which testing approach would BEST confirm this hypothesis?

   • AAdd more gateways to provide redundancy for the sensors.
   • BIncrease the sensor transmit power to improve the LPWAN link margin.
   • CRun a packet capture on the gateway's backhaul interface and compare the number of forwarded packets with the number received by the cloud.
   • DCheck the sensor firmware for a bug that causes it to skip transmissions.
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   A water-treatment plant is deploying pH sensors that connect to a SCADA system via a serial-to-Ethernet gateway. During integration testing, the SCADA system displays readings that are consistently 0.5 pH units higher than the lab reference. The sensor has been calibrated. Which step should the team take NEXT?

   • AIgnore the offset because the sensor is calibrated and the readings are close.
   • BReplace the sensor with a new one to rule out a hardware fault.
   • CReboot the gateway to clear any temporary communication errors.
   • DVerify the scaling and offset configuration in the gateway or SCADA system against the sensor's output range.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A startup is developing a consumer smart-home hub that must support both Zigbee and Wi-Fi devices. The hardware team has chosen a dual-radio module. During development, the firmware team discovers that the Zigbee radio and the Wi-Fi radio interfere with each other because they operate on the same 2.4 GHz band. The team needs to ensure reliable operation of both radios simultaneously. Which design approach is MOST effective?

   • AImplement time-division multiplexing so the Zigbee and Wi-Fi radios do not transmit at the same time, coordinated by the firmware.
   • BIncrease the Wi-Fi transmit power to overcome the Zigbee interference.
   • CDisable the Zigbee radio when Wi-Fi is active and rely on Wi-Fi for all devices.
   • DUse a separate external antenna for each radio to reduce coupling.
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A smart-agriculture startup is developing a soil-moisture sensor node. The team has completed the sensor firmware and the cloud dashboard independently. During integration testing, they discover that the sensor readings occasionally arrive at the dashboard with timestamps that are several minutes in the past. The firmware developer insists the sensor clock is accurate, and the cloud developer insists the ingestion API timestamps correctly. Which action should the team take FIRST to isolate the root cause?

   • AAdd a timestamp at each stage of the data path (sensor capture, gateway relay, cloud ingestion) and compare them under test.
   • BReplace the sensor's real-time clock with a GPS-synchronized clock module.
   • CIncrease the cloud dashboard's refresh rate to display data more frequently.
   • DSwitch the sensor from Wi-Fi to LoRaWAN to reduce network transmission delay.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A smart-farming company is developing a drone that surveys crop health using a multispectral camera. The drone captures images and must upload them to a cloud server when it lands. The development team is writing the firmware for the camera and the communication module. Which development task is MOST critical to ensure the images are not lost if the drone loses connectivity mid-upload?

   • AIncrease the camera resolution to capture more detail in each image.
   • BUse a faster cellular modem to upload images more quickly.
   • CImplement a local storage buffer on the drone that retains images until the cloud acknowledges receipt.
   • DCompress the images to reduce the upload time.
   Reveal Solution Discussion Select an answer first