Microsoft Microsoft Certifications AZ-220 Questions & Answers

• Question 61:

  You need to visualize Azure IoT Hub telemetry data by using Microsoft Power BI. Which service should you connect to the IoT hub?

  A. Azure Event Grid

  B. SendGrid

  C. Azure Stream Analytics

  D. Azure Notification Hubs

  Correct Answer: C

  You can use Microsoft Power BI to visualize real-time sensor data that your Azure IoT hub receives. To do so, you configure an Azure Stream Analytics job to consume the data from IoT Hub and route it to a dataset in Power BI.

  Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-live-data-visualization-in-power-bi

• Question 62:

  You have an Azure subscription that contains an Azure Time Series Insights environment. The environment has the properties shown in the following table.

  

  You need to create a D.

  Which two time series expressions can be correctly used as part of the query? Each correct answer presents a complete solution.

  NOTE: Each correct selection is worth one point.

  A. $event.p1.String = 'abc'

  B. $event.p2 = 'abc'

  C. $event['p1'] != NULL

  D. $event.p4.p5 = 0.0

  Correct Answer: AC

  Example: $event['p1'] != NULL ['p1'] is the only token used. Interpreted as $event['p1'].Double != NULL

  Incorrect Answers:

  B: $event.p1 = 'abc'

  Type mismatch.

  D: $event.p4.p5 = 0.0

  Invalid property reference syntax. A type must be specified on LHS of comparison.

  Reference:

  https://docs.microsoft.com/en-us/rest/api/time-series-insights/reference-time-series-expression-syntax

• Question 63:

  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 IoT solution that includes an Azure IoT hub and an Azure IoT Edge device.

  You plan to deploy 10 Bluetooth sensors. The sensors do not support MQTT, AMQP, or HTTPS.

  You need to ensure that all the sensors appear in the IoT hub as a single device.

  Solution: You configure the IoT Edge device as an IoT Edge transparent gateway. You configure the sensors to connect to the device.

  Does this meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  IoT Edge transparent gateways support only the MQTT or AMQP protocols.

  Instead use a translation gateway.

  IoT Hub. The translation module receives messages from downstream devices, translates them into a supported protocol, and then the IoT Edge device sends the messages on behalf of the downstream devices. All information looks like it is

  coming from one device, the gateway.

  Reference:

  https://docs.microsoft.com/en-us/azure/iot-edge/iot-edge-as-gateway

• Question 64:

  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 are developing a custom Azure IoT Edge module.

  The module needs to identify the device ID of the local device.

  Solution: You configure the module to read the device ID of the device twin.

  Does this meet the goal?

  A. Yes

  B. No

  Correct Answer: A

  Device twins are JSON documents that store device state information including metadata, configurations, and conditions. Azure IoT Hub maintains a device twin for each device that you connect to IoT Hub. Device identity properties. The root of the device twin JSON document contains the read-only properties from the corresponding device identity stored in the identity registry.

  Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins

• Question 65:

  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 IoT solution that includes an Azure IoT hub and an Azure IoT Edge device.

  You plan to deploy 10 Bluetooth sensors. The sensors do not support MQTT, AMQP, or HTTPS.

  You need to ensure that all the sensors appear in the IoT hub as a single device.

  Solution: You configure the sensors to connect directly to the IoT hub.

  Does this meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Instead use a translation gateway.

  Note: In the protocol translation gateway pattern, only the IoT Edge gateway has an identity with IoT Hub. The translation module receives messages from downstream devices, translates them into a supported protocol, and then the IoT Edge device sends the messages on behalf of the downstream devices. All information looks like it is coming from one device, the gateway.

  Reference: https://docs.microsoft.com/en-us/azure/iot-edge/iot-edge-as-gateway

• Question 66:

  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 are developing a custom Azure IoT Edge module.

  The module needs to identify the device ID of the local device.

  Solution: You configure the module to read the IOTEDGE_DEVICEID environment variable.

  Does this meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  The Azure ID of the current device is available on the IOTEDGE_DEVICEID environment variable.

  Instead read the device ID of the device twin.

  Note: Device twins are JSON documents that store device state information including metadata, configurations, and conditions. Azure IoT Hub maintains a device twin for each device that you connect to IoT Hub.

  Device identity properties. The root of the device twin JSON document contains the read-only properties from the corresponding device identity stored in the identity registry.

  Reference:

  https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins

• Question 67:

  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 are developing a custom Azure IoT Edge module.

  The module needs to identify the device ID of the local device.

  Solution: You configure the module to read the ProductInfo property of ModuleClient.

  Does this meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Instead read the device ID of the device twin.

  Note: Device twins are JSON documents that store device state information including metadata, configurations, and conditions. Azure IoT Hub maintains a device twin for each device that you connect to IoT Hub. Device identity properties. The root of the device twin JSON document contains the read-only properties from the corresponding device identity stored in the identity registry.

  Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins

• Question 68:

  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. Configure an IoT Edge gateway. Deploy an IoT Edge Modbus module. From the Azure portal, create IoT devices and add connection strings to the devices.

  B. Add the MQTT devices to the IoT hub and configure an IoT Edge gateway. From the IoT Edge gateway device, assign the MQTT devices as child devices of the gateway. Use the File upload feature of IoT Hub when internet connectivity is available.

  C. Add the MQTT devices to the IoT hub, configure an IoT Edge gateway, and set Enable connection to IoT Hub to Disable. From the IoT Edge gateway device, assign the MQTT devices as child devices of the gateway. Deploy the IoT Edge Modbus module.

  D. Add the MQTT devices to the IoT hub and configure an IoT Edge gateway. From the IoT Edge gateway device, assign the MQTT devices as child devices of the gateway. Deploy an IoT Edge Modbus module.

  Correct Answer: C

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

• Question 69:

  You have an Azure IoT Edge module named SampleModule that runs on a device named Device1.

  You make changes to the code of SampleModule by using Microsoft Visual Studio Code.

  You need to push the code to the container registry and then deploy the module to Device1.

  Which two actions should you perform from Visual Studio Code? Each correct answer presents part of the solution.

  NOTE: Each correct selection is worth one point.

  A. Build and push the SampleModule code to the registry.

  B. Create a deployment for a single device.

  C. Generate a deployment manifest.

  D. Build an IoT Edge solution.

  E. Generate a shared access signature (SAS) token for Device1.

  Correct Answer: BC

  C: Configure a deployment manifest. A deployment manifest is a JSON document that describes which modules to deploy, how data flows between the modules, and desired properties of the module twins.

  B: You deploy modules to your device by applying the deployment manifest that you configured with the module information.

  Reference: https://docs.microsoft.com/en-us/azure/iot-edge/how-to-deploy-modules-vscode

• Question 70:

  You are configuring a production environment for an Azure IoT solution.

  You plan to deploy 1,000 IoT devices. Each device will send one device-to-cloud message every hour. Each message will be 4 KB.

  You need to deploy an Azure IoT hub that will support the IoT device deployment. The solution must meet the following requirements:

  Perform bulk device operations such as creating multiple device identities.

  Minimize costs

  What should you deploy?

  A. one unit of the B1 tier

  B. one unit of the free tier

  C. one unit of the S1 tier

  D. one unit of the S2 tier

  Correct Answer: B

  Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-quotas-throttling