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  1. Home
  2. Microsoft Certification
  3. AZ-220 Exam
  4. Microsoft.AZ-220.v2024-04-05.q140 Dumps
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Question 81

You have an Azure subscription that contains an Azure Time Series Insights environment. The environment has the properties shown in the following table.

You need to create a D.
Which two time series expressions can be correctly used as part of the query? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.

Correct Answer: A,C
Example: $event['p1'] != NULL
['p1'] is the only token used. Interpreted as $event['p1'].Double != NULL Reference:
https://docs.microsoft.com/en-us/rest/api/time-series-insights/reference-time-series-expression-syntax
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Question 82

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.

Correct Answer:

Explanation:
Step: With DPS (Device Provisioning Service) you can generate device credentials and configure the devices offline without registering the devices through IoT Central UI.
Connect devices that use SAS tokens without registering
1. Copy the IoT Central application's group primary key
2. Use the dps-keygen tool to generate the device SAS keys. Use the group primary key from the previous step. The device IDs must be lower-case:
dps-keygen -mk:<group primary key> -di:<device ID>
3. The OEM flashes each device with a device ID, a generated device SAS key, and the application ID scope value.
4. When you switch on a device, it first connects to DPS to retrieve its IoT Central registration information.
The device initially has a device status Unassociated on the Devices page and isn't assigned to a device template. On the Devices page, Migrate the device to the appropriate device template. Device provisioning is now complete, the device status is now Provisioned, and the device can start sending data.
On the Administration > Device connection page, the Auto approve option controls whether you need to manually approve the device before it can start sending data.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/concepts-get-connected
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Question 83

You create an Azure Stream Analytics job that has the following query.

The job is configured to have an Azure IoT Hub input and an output to an Azure function.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

Correct Answer:

Reference:
https://docs.microsoft.com/en-us/stream-analytics-query/time-management-azure-stream-analytics
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Question 84

You have an Azure IoT Central application.
You add an IoT device named Oven1 to the application. Oven1 uses an IoT Central template for industrial ovens.
You need to send an email to the managers group at your company as soon as the oven temperature falls below 400 degrees.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

Correct Answer: B,E
Devices use telemetry to send numerical data from the device. A rule triggers when the selected telemetry crosses a specified threshold.
E: To create a telemetry rule, the device template must include at least one telemetry value. The rule monitors the temperature reported by the device and sends an email when it falls below 400 degrees.
B: Configure the rule conditions.
Conditions define the criteria that the rule monitors. In this tutorial, you configure the rule to fire when the temperature exceeds 70°F.
1. Select Temperature in the Telemetry dropdown.
2. Next, choose Is less than as the Operator and enter 400 as the Value.

3. Optionally, you can set a Time aggregation. When you select a time aggregation, you must also select an aggregation type, such as average or sum from the aggregation drop-down.
Without aggregation, the rule triggers for each telemetry data point that meets the condition.
With aggregation, the rule triggers if the aggregate value of the telemetry data points in the time window meets the condition.
Reference:
https://docs.microsoft.com/en-us/azure/iot-central/core/tutorial-create-telemetry-rules
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Question 85

You have an Azure IoT hub.
You need to deploy a Device Provisioning Service instance that uses X.509 attestation to support new loT devices.
Which three actions should you perform in sequence in the Azure portal? To answer move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.

Correct Answer:

1 - Create an IoT Hub Device Provisioning Service instance.
2 - Link the IoT hub to the Device Provisioning Service instance.
3 - Create an enrollment group for X.509 and set an allocation policy
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