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You have 1,000 devices that connect to an Azure IoT hub. You are performing a scheduled check of deployed IoT devices. You plan to run the following command from the Azure CLI prompt. aziot hub query --hub-name hub1 --query-command "SELECT * FROM devices WHERE connectionState = 'Disconnected'" What does the command return?
Correct Answer: A
The IoT Hub publishes the Microsoft.Devices.DeviceDisconnected event type, which is published when a device is disconnected from an IoT hub. Reference: https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-event-grid#event-types