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The Microsoft AZ-220 (Microsoft Azure IoT Developer) Certification Exam is a great way for professionals to validate their skills and knowledge in Azure IoT development. With this certification, individuals can demonstrate their expertise in designing, implementing, and maintaining IoT solutions using Microsoft Azure. The exam is challenging, but with the right preparation and experience, passing it can open up many career opportunities in the field of IoT development.

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Microsoft Azure IoT Developer Sample Questions (Q26-Q31):

NEW QUESTION # 26
You have an Azure IoT Central application that includes a Device Provisioning Service instance.
You need to connect IoT devices to the application without first registering the devices.
In which order should you perform the actions? To answer, move all actions from the list of actions to the answer area and arrange them in the correct order.

Answer:

Explanation:

Explanation:
Step: With DPS (Device Provisioning Service) you can generate device credentials and configure the devices offline without registering the devices through IoT Central UI.
Connect devices that use SAS tokens without registering
1. Copy the IoT Central application's group primary key
2. Use the dps-keygen tool to generate the device SAS keys. Use the group primary key from the previous step. The device IDs must be lower-case:
dps-keygen -mk:<group primary key> -di:<device ID>
3. The OEM flashes each device with a device ID, a generated device SAS key, and the application ID scope value.
4. When you switch on a device, it first connects to DPS to retrieve its IoT Central registration information.
The device initially has a device status Unassociated on the Devices page and isn't assigned to a device template. On the Devices page, Migrate the device to the appropriate device template. Device provisioning is now complete, the device status is now Provisioned, and the device can start sending data.
On the Administration > Device connection page, the Auto approve option controls whether you need to manually approve the device before it can start sending data.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/concepts-get-connected


NEW QUESTION # 27
You are developing an Azure IoT solution for a shipping company. The company's ships will have sensors used for predictive maintenance. Some sensor devices will be MQTT-capable, and others will use Modbus.
Each ship has an internet connection that is available only when the ship is docked.
You create an Azure IoT hub.
You need to implement an IoT solution that uses Azure IoT Edge.
What should you do?

  • A. Add the MQTT devices to the loT hub and configure an loT Edge gateway. From the loT Edge gateway device, assign the MQTT devices as child devices of the gateway. Use the File upload feature of loT Hub when internet connectivity is available.
  • B. Add the MQTT devices to the loT hub and configure an loT Edge gateway. From the loT Edge gateway device, assign the MQTT devices as child devices of the gateway. Deploy an loT Edge Modbus module.
  • C. Add the MQTT devices to the loT hub. configure an loT Edge gateway, and set Enable connection to loT Hub to Disable. From the loT Edge gateway device, assign the MQTT devices as child devices of the gateway. Deploy the loT Edge Modbus module.
  • D. Configure an loT Edge gateway. Deploy an loT Edge Modbus module. From the Azure portal, create loT devices and add connection strings to the devices.

Answer: C

Explanation:
https://docs.microsoft.com/en-us/azure/iot-edge/deploy-modbus-gateway


NEW QUESTION # 28
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution.
After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have an Azure Stream Analytics job that receives input from an Azure IoT hub and sends the outputs to Azure Blob storage. The job has compatibility level 1.1 and six streaming units.
You have the following query for the job.

You plan to increase the streaming unit count to 12.
You need to optimize the job to take advantage of the additional streaming units and increase the throughput.
Solution: You change the query to the following.

Does this meet the goal?

  • A. Yes
  • B. No

Answer: B

Explanation:
Explanation
Max number of Streaming Units with one step and with no partitions is 6.
Reference:
https://docs.microsoft.com/en-us/azure/stream-analytics/stream-analytics-parallelization


NEW QUESTION # 29
You have an Azure Stream Analytics job that connects to an Azure IoT hub named Hub1445 as a streaming data source. Hub1445 is configured as shown in the exhibit. (Click the Exhibit tab.)

The Stream Analytics job fails to receive any messages from the IoT hub. What should you do to resolve the issue?

  • A. Enable the Route3 route.
  • B. Change the Route1 route query to true.
  • C. Disable the Route2 route.
  • D. Enable the fallback route.

Answer: A

Explanation:
Explanation
The device telemetry is usually passed as JSON from the device through the IoT Hub - this is handled nicely by Azure Streaming Analytics queries.
The IoT Hub message routing should be configured as follows: Data source: Device Telemetry Messages Routing query: true (as the routing query is an expression that evaluates to true or false for each received message, the simplest way to send all messages to the endpoint is to just supply true as the query).
Reference:
https://darenmay.com/blog/azure-iot-streaming-analytics-data-lake-analytics-and-json/


NEW QUESTION # 30
You have an Azure IoT Central application that has a custom device template.
You need to configure the device template to support the following activities:
* Return the reported power consumption.
* Configure the desired fan speed.
* Run the device reset routine.
* Read the fan serial number.
Which option should you use for each activity? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

Answer:

Explanation:

Explanation

Box 1: Measurement
Telemetry/measurement is a stream of values sent from the device, typically from a sensor. For example, a sensor might report the ambient temperature.
Box 2: Property
The template can provide a writeable fan speed property
Properties represent point-in-time values. For example, a device can use a property to report the target temperature it's trying to reach. You can set writeable properties from IoT Central.
Box 3: Settings
Box 4: Command
You can call device commands from IoT Central. Commands optionally pass parameters to the device and receive a response from the device. For example, you can call a command to reboot a device in 10 seconds.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/howto-set-up-template


NEW QUESTION # 31
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