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You have an Azure IoT solution.
You plan to register an Azure loT Edge device by using X.509 self-signed certificates.
You need to provide the thumbprint for the primary and secondary certificates.
Solution: You generate a 96-hex character SHA384 hash for the certificates.
Does this meet the goal?
You have 10 devices that connect to an Azure loT hub. Each device has a unique public IP address. The devices are not provisioned through DPS.
You discover an anomaly in messages from two devices.
You need to stop all messages from both devices without affecting the other devices.
Solution: You add IP filter rules for the devices.
Does this meet the goal?
You have an Azure IoT Central solution that includes multiple IoT devices. The devices report temperature, humidity, and pressure.
You need to export the sensor data captured during a 48-hour period as a CSV file.
What should you use in IoT Central?
Azure IoT Central provides rich analytics capabilities to analyze historical trends and correlate telemetry from your devices. To get started, select Analytics on the left pane.
The analytics user interface has three main components:
Data configuration panel: On the configuration panel, select the device group for which you want to analyze the data. Next, select the telemetry that you want to analyze and select the aggregation method for each telemetry. The Group By control helps to group the data by using device properties as dimensions.
Time control: Use the time control to select the duration for which you want to analyze the data.
Chart control: The chart control visualizes the data as a line chart.
https://docs.microsoft.com/en-us/azure/iot-central/core/howto-create-analytics
You have an Azure IoT solution that includes a standard tier Azure IoT hub and an IoT device.
The device sends one 100-KB device-to-cloud message every hour.
You need to calculate the total daily message consumption of the device. What is the total daily message consumption of the device?
100 KB * 24 is around 2,400 bytes.
The 100 KB message is divided into 4 KB blocks, and it is billed for 25 messages. 25 times 24 is 600
Note: The maximum message size for messages sent from a device to the cloud is 256 KB. These messages are metered in 4 KB blocks for the paid tiers so for instance if the device sends a 16 KB message via the paid tiers it will be billed as 4 messages.
https://azure.microsoft.com/en-us/pricing/details/iot-hub/
You have 1,000 devices that connect to a standard tier Azure IoT hub.
All the devices are commissioned and send telemetry events to the built-in IoT Hub endpoint. You configure message enrichment on the events endpoint and set the enrichment value to $twin.tags.ipV4.
When you inspect messages on the events endpoint, you discover that all the messages are stamped with a string of "$twin.tags.ipV4".
What are two possible causes of the issue? Each Answer presents a complete solution.
NOTE: Each correct selection is worth one point.
In some cases, if you are applying an enrichment with a value set to a tag or property in the device twin, the value will be stamped as a string value. For example, if an enrichment value is set to $twin.tags.field, the messages will be stamped with the string '$twin.tags.field' rather than the value of that field from the twin. This happens in the following cases:
(C) Your IoT Hub is in the standard tier, but the device sending the message has no device twin.
(E) Your IoT Hub is in the standard tier, but the device twin path used for the value of the enrichment does not exist. For example, if the enrichment value is set to $twin.tags.location, and the device twin does not have a location property under tags, the message is stamped with the string '$twin.tags.location'.
Your IoT Hub is in the basic tier. Basic tier IoT hubs do not support device twins.
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-message-enrichments-overview
