Microsoft AZ-220 Exam Practice Questions (P. 4)
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Question #18
HOTSPOT -
You have an Azure IoT Central application that has a custom device template.
You need to configure the device template to support the following activities:
✑ Return the reported power consumption.
✑ Configure the desired fan speed.
✑ Run the device reset routine.
✑ Read the fan serial number.
Which option should you use for each activity? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
Hot Area:
You have an Azure IoT Central application that has a custom device template.
You need to configure the device template to support the following activities:
✑ Return the reported power consumption.
✑ Configure the desired fan speed.
✑ Run the device reset routine.
✑ Read the fan serial number.
Which option should you use for each activity? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
Hot Area:
Correct Answer:
A device template in Azure IoT Central is a blueprint that defines the:
✑ Telemetry a device sends to IoT Central.
✑ Properties a device synchronizes with IoT Central.
✑ Commands that IoT Central calls on a device.
Box 1: Measurement -
Telemetry/measurement is a stream of values sent from the device, typically from a sensor. For example, a sensor might report the ambient temperature.
Box 2: Properties -
The template can provide a writeable fan speed property
Properties represent point-in-time values. For example, a device can use a property to report the target temperature it's trying to reach. You can set writeable properties from IoT Central.
Box 3: Properties -
Box 4: Command -
You can call device commands from IoT Central. Commands optionally pass parameters to the device and receive a response from the device. For example, you can call a command to reboot a device in 10 seconds.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/howto-set-up-template
A device template in Azure IoT Central is a blueprint that defines the:
✑ Telemetry a device sends to IoT Central.
✑ Properties a device synchronizes with IoT Central.
✑ Commands that IoT Central calls on a device.
Box 1: Measurement -
Telemetry/measurement is a stream of values sent from the device, typically from a sensor. For example, a sensor might report the ambient temperature.
Box 2: Properties -
The template can provide a writeable fan speed property
Properties represent point-in-time values. For example, a device can use a property to report the target temperature it's trying to reach. You can set writeable properties from IoT Central.
Box 3: Properties -
Box 4: Command -
You can call device commands from IoT Central. Commands optionally pass parameters to the device and receive a response from the device. For example, you can call a command to reboot a device in 10 seconds.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/howto-set-up-template
Question #19
DRAG DROP -
You have an Azure IoT Central application that includes a Device Provisioning Service instance.
You need to connect IoT devices to the application without first registering the devices.
In which order should you perform the actions? To answer, move all actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
You have an Azure IoT Central application that includes a Device Provisioning Service instance.
You need to connect IoT devices to the application without first registering the devices.
In which order should you perform the actions? To answer, move all actions from the list of actions to the answer area and arrange them in the correct order.
Select and Place:
Correct Answer:
Step 1: Obtain the credential -
Obtain the group primary key from the IoT Central enrollment group.
Step 2: Generate device credentials
The group primary key used to generate device credentials
Step 3: Flash unique credentials to the devices
The OEM flashes each device with a device ID, a generated device SAS key, and the application ID scope value.
Step 4: Connect the devices to IoT Central
Step 5: Associate the devices to a template and approve the connections
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/concepts-get-connected
Step 1: Obtain the credential -
Obtain the group primary key from the IoT Central enrollment group.
Step 2: Generate device credentials
The group primary key used to generate device credentials
Step 3: Flash unique credentials to the devices
The OEM flashes each device with a device ID, a generated device SAS key, and the application ID scope value.
Step 4: Connect the devices to IoT Central
Step 5: Associate the devices to a template and approve the connections
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/concepts-get-connected
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