Microsoft Microsoft Certifications AZ-220 Questions & Answers

• Question 131:

  You plan to deploy an Azure IoT hub. The IoT hub must support the following:

  1.

  Three Azure IoT Edge devices

  2.

  2,500 IoT devices

  Each IoT device will spend a 6 KB message every five seconds.

  You need to size the IoT hub to support the devices. The solution must minimize costs.

  What should you choose?

  A. one unit of the S1 tier

  B. one unit of the B2 tier

  C. one unit of the B1 tier

  D. one unit of the S3 tier

  Correct Answer: D

  2500* 6 KB * 12 = 180,000 KB/minute = 180 MB/Minute. B3, S3 can handle up to 814 MB/minute per unit. Incorrect Answers:

  A, C: B1, S1 can only handle up to 1111 KB/minute per unit

  B: B2, S2 can only handle up to 16 MB/minute per unit.

  Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-scaling

• Question 132:

  You have an IoT device that gathers data in a CSV file named Sensors.csv.

  You deploy an Azure IoT hub that is accessible at ContosoHub.azure-devices.net.

  You need to ensure that Sensors.csv is uploaded to the IoT hub.

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

  NOTE: Each correct selection is worth one point.

  A. Upload Sensors.csv by using the IoT Hub REST API.

  B. From the Azure subscription, select the IoT hub, select Message routing, and then configure a route to storage.

  C. From the Azure subscription, select the IoT hub, select File upload, and then configure a storage container.

  D. Configure the device to use a GET request to ContosoHub.azure-devices.net/devices/ContosoDevice1/files/notifications.

  Correct Answer: AC

  C: To use the file upload functionality in IoT Hub, you must first associate an Azure Storage account with your hub. Select File upload to display a list of file upload properties for the IoT hub that is being modified.

  For Storage container: Use the Azure portal to select a blob container in an Azure Storage account in your current Azure subscription to associate with your IoT Hub. If necessary, you can create an Azure Storage account on the Storage accounts blade and blob container on the Containers

  A: IoT Hub has an endpoint specifically for devices to request a SAS URI for storage to upload a file. To start the file upload process, the device sends a POST request to {iot hub}.azure-devices.net/devices/{deviceId}/files with the following JSON body: { "blobName": "{name of the file for which a SAS URI will be generated}" }

  Incorrect Answers:

  D: Deprecated: initialize a file upload with a GET. Use the POST method instead.

  Reference: https://github.com/MicrosoftDocs/azure-docs/blob/master/articles/iot-hub/iot-hub-configure-file-upload.md

• Question 133:

  You plan to deploy a standard tier Azure IoT hub.

  You need to perform an over-the-air (OTA) update on devices that will connect to the IoT hub by using scheduled jobs.

  What should you use?

  A. a device-to-cloud message

  B. the device twin reported properties

  C. a cloud-to-device message

  D. a direct method

  Correct Answer: D

  Releases via the REST API.

  All of the operations that can be performed from the Console can also be automated using the REST API. You might do this to automate your build and release process, for example.

  You can build firmware using the Particle CLI or directly using the compile source code API.

  Note: Over-the-air (OTA) firmware updates are a vital component of any IoT system. Over-the-air firmware updates refers to the practice of remotely updating the code on an embedded device.

  Reference:

  https://docs.particle.io/tutorials/device-cloud/ota-updates/

• Question 134:

  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 question, 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, a Device Provisioning Service instance, and 1,000 connected IoT devices.

  All the IoT devices are provisioned automatically by using one enrollment group. You need to temporarily disable the IoT devices from the connecting to the IoT hub.

  Solution: From the IoT hub, you change the credentials for the shared access policy of the IoT devices.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Reference: https://docs.microsoft.com/bs-latn-ba/azure/iot-dps/how-to-unprovision-devices

• Question 135:

  You have an Azure IoT solution that includes an Azure IoT hub, a Device Provisioning Service instance, and 1,000 connected IoT devices.

  All the IoT devices are provisioned automatically by using one enrollment group.

  You need to temporarily disable the IoT devices from the connecting to the IoT hub.

  Solution: You delete the enrollment group from the Device Provisioning Service.

  Does the solution meet the goal?

  A. Yes

  B. No

  Correct Answer: B

  Instead, from the Device Provisioning Service, you disable the enrollment group, and you disable device entries in the identity registry of the IoT hub to which the IoT devices are provisioned.

  Reference: https://docs.microsoft.com/bs-latn-ba/azure/iot-dps/how-to-unprovision-devices

• Question 136:

  HOTSPOT

  You have an Azure subscription that contains an Azure loT hub named Hub1 and the IoT devices shown in the following table.

  

  You have the automatic device configure rations shown in the following table.

  

  For each of the following statements, select Yes if the statement is true. Otherwise, select No. NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

• Question 137:

  HOTSPOT

  You have an Azure 10T hub and an I0T device.

  You are developing an loT solution that will generate an alert when the IoT device leaves a geofenced area. The device sends telemetry in the following format.

  

  You create an Azure Stream Analytics job that uses telemetry input from the loT hub and a reference input that contains the data shown in the following table.

  

  How should you complete the Stream Analytics query? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

• Question 138:

  HOTSPOT

  You have an Azure IoT Edge automatic deployment named D1 that deploys a temperature module to five IoT Edge devices.

  D1 has a deployment priority of 10 and the following module configuration.

  

  You need to create a new layered deployment that will add a new twin property named ReportingMode. The new deployment must not overwrite the existing module configurations set by D1.

  How should you configure the deployment? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: 1

  A priority defines whether a deployment should be applied to a targeted device relative to other deployments. A deployment priority is a positive integer, with larger numbers denoting higher priority. If an IoT Edge device is targeted by more

  than one deployment, the deployment with the highest priority applies. Deployments with lower priorities are not applied, nor are they merged. If a device is targeted with two or more deployments with equal priority, the most recently created

  deployment (determined by the creation timestamp) applies.

  Box 2: "properties.tags": {

  You create a deployment manifest and then define which devices it applies to based on tags in the device twin.

  Reference:

  https://docs.microsoft.com/en-us/azure/iot-edge/module-deployment-monitoring

• Question 139:

  HOTSPOT

  You need to configure Azure IoT Edge module routing to ensure that modules route traffic as shown in the following exhibit.

  

  How should you complete the IoT Edge module routes? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

• Question 140:

  HOTSPOT

  You have an Azure IoT hub.

  You plan to deploy 1,000 IoT devices by using automatic device management.

  The device twin is shown below.

  

  You need to configure automatic device management for the deployment.

  Which target Condition and Device Twin Path should you use? To answer, select the appropriate options in the answer area.

  NOTE: Each correct selection is worth one point.

  Hot Area:

  

  Correct Answer:

  

  Box 1: tags.engine.warpDriveType='VM105a'

  Use tags to target twins. Before you create a configuration, you must specify which devices or modules you want to affect. Azure IoT Hub identifies devices and using tags in the device twin, and identifies modules using tags in the module

  twin.

  Box 2: properties.desired.warpOperating

  The twin path, which is the path to the JSON section within the twin desired properties that will be set.

  For example, you could set the twin path to properties.desired.chiller-water and then provide the following JSON content:

  { "temperature": 66, "pressure": 28

  }

  Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-automatic-device-management