AZ-220 Series Practice Questions
The free AZ-220: Microsoft Azure IoT Developer questions that deal with series, with answers and explanations. The full bank and the timed practice test cover every topic the exam asks about.
Question #1
You plan to deploy Azure Time Series Insights. What should you create on iothub1 before you deploy Time Series Insights?
Correct answer: B
Explanation
Create a dedicated consumer group in the IoT hub for the Time Series Insights environment to consume from. Each Time Series Insights event source must have its own dedicated consumer group that isn't shared with any other consumer. If multiple readers consume events from the same consumer group, all readers are likely to exhibit failures. Reference: https://docs.microsoft.com/en-us/azure/time-series-insights/time-series-insights-how-to-add-an-event-source- iothub
Question #6
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 devices that connect to an Azure IoT hub. Each device has a fixed GPS location that includes latitude and longitude. You discover that a device entry in the identity registry of the IoT hub is missing the GPS location. You need to configure the GPS location for the device entry. The solution must prevent the changes from being propagated to the physical device. Solution: You add tags to the device twin. Does the solution meet the goal?
Correct answer: A
Explanation
Instead add the desired properties to the device twin. Note: Device Twins are used to synchronize state between an IoT solution's cloud service and its devices. Each device's twin exposes a set of desired properties and reported properties. The cloud service populates the desired properties with values it wishes to send to the device. When a device connects it requests and/or subscribes for its desired properties and acts on them. Reference: https://azure.microsoft.com/sv-se/blog/deep-dive-into-azure-iot-hub-notifications-and-device-twin/
Question #10
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 devices that connect to an Azure IoT hub. Each device has a fixed GPS location that includes latitude and longitude. You discover that a device entry in the identity registry of the IoT hub is missing the GPS location. You need to configure the GPS location for the device entry. The solution must prevent the changes from being propagated to the physical device. Solution: You add the desired properties to the device twin. Does the solution meet the goal?
Correct answer: B
Explanation
Device Twins are used to synchronize state between an IoT solution's cloud service and its devices. Each device's twin exposes a set of desired properties and reported properties. The cloud service populates the desired properties with values it wishes to send to the device. When a device connects it requests and/or subscribes for its desired properties and acts on them. Reference: https://azure.microsoft.com/sv-se/blog/deep-dive-into-azure-iot-hub-notifications-and-device-twin/
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