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Microsoft AZ-220 Certification Exam Practice Questions – Part 1

Posted on September 27, 2020 By DesiBanjara No Comments on Microsoft AZ-220 Certification Exam Practice Questions – Part 1

Microsoft AZ-220 Certification: Microsoft Azure IoT Developer Certification Exam Practice Questions and Answers

Question #1

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 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.

Does the solution meet the goal?

A. Yes

B. No

Correct Answer: A
You may find it necessary to deprovision devices that were previously auto provisioned through the Device Provisioning Service.
In general, deprovisioning a device involves two steps:
1. Disenroll the device from your provisioning service, to prevent future auto-provisioning. Depending on whether you want to revoke access temporarily or permanently, you may want to either disable or delete an enrollment entry.
2. Deregister the device from your IoT Hub, to prevent future communications and data transfer. Again, you can temporarily disable or permanently delete the device’s entry in the identity registry for the IoT Hub where it was provisioned.

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



Question #2

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: 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 #3

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 #4

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.




Question #5

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



Question #6

You plan to deploy an Azure IoT hub.
The IoT hub must support the following:
✑ Three Azure IoT Edge devices
✑ 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




Next->Microsoft AZ-220 Certification – Part 2

More Exam Questions:

Sample Exam Questions 6: AZ-300: Microsoft Azure Architect Technologies

Sample Exam Questions 5: AZ-300: Microsoft Azure Architect Technologies


Microsoft Azure certifications, Microsoft Exam AZ-220 Tags:IoT Edge devices, IoT Hub, IoT Hub REST API, Microsoft, Microsoft Azure, Microsoft Azure IoT Developer, Microsoft Exam AZ-220

Post navigation

Previous Post: AWS DevOps Engineer Professional Exam Practice Questions – 12
Next Post: How to read the telemetry from Azure IOT hub by Azure CLI

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