Valid AZ-220 Exam Q&A PDF AZ-220 Dump is Ready (Updated 137 Questions)
Exam Questions and Answers for AZ-220 Study Guide
Microsoft AZ-220 Exam Syllabus Topics:
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Explaining Associated Certification
Making efforts towards AZ-220 exam leads to earning the Microsoft Certified: Azure IoT Developer Specialty certification. It is an upper-level designation designed to impart in candidates best-in-class expertise in cloud development and edge components of an Azure IoT solution. The earners of this high-skilled certificate are also known to have unmatched expertise in device life cycle set-up, the configuration of cloud services, debugging the IoT issues, and the transformation of IoT-related data pipelines.
NEW QUESTION 20
You develop a custom Azure IoT Edge module named temperature-module.
You publish temperature-module to a private container registry named mycr.azurecr.io You need to build a deployment manifest for the IoT Edge device that will run temperature-module.
Which three container images should you define in the manifest? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.
- A. mcr.microsoft.com/iotedgedev:2.0
- B. mycr.azurecr.io/temperature-module:latest
- C. mcr.microsoft.com/azureiotedge-simulated-temperature-sensor:1.0
- D. mcr.microsoft.com/azureiotedge-agent:1.0
- E. mcr.microsoft.com/azureiotedge-hub:1.0
Answer: B,D,E
Explanation:
Explanation
Each IoT Edge device runs at least two modules: $edgeAgent and $edgeHub, which are part of the IoT Edge runtime. IoT Edge device can run multiple additional modules for any number of processes. Use a deployment manifest to tell your device which modules to install and how to configure them to work together.
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/module-composition
NEW QUESTION 21
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?
- A. No
- B. Yes
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/
NEW QUESTION 22
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.
Answer:
Explanation:
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
NEW QUESTION 23
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 section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.
You have a Standard tier Azure IoT hub and a fleet of IoT devices.
The devices connect to the IoT hub by using either Message Queuing Telemetry Transport (MQTT) or Advanced Message Queuing Protocol (AMQP).
You need to send data to the IoT devices and each device must respond. Each device will require three minutes to process the data and respond.
Solution: You update the twin desired property and check the corresponding reported property.
Does this meet the goal?
- A. No
- B. Yes
Answer: B
Explanation:
Explanation
IoT Hub provides three options for device apps to expose functionality to a back-end app:
* Twin's desired properties for long-running commands intended to put the device into a certain desired
* state. For example, set the telemetry send interval to 30 minutes.
* Direct methods for communications that require immediate confirmation of the result.
* Direct methods are often used for interactive control of devices such as turning on a fan.
* Cloud-to-device messages for one-way notifications to the device app.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-c2d-guidance
NEW QUESTION 24
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?
- A. the Connections logs
- B. the device credentials
- C. the device twins
- D. the Device Disconnected events
Answer: D
Explanation:
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
NEW QUESTION 25
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 use an Azure policy to apply tags to a resource group. Does the solution meet the goal?
- A. No
- B. Yes
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/
NEW QUESTION 26
You have an Azure IoT hub named Hub1 and an Azure Time Series Insights environment named tsi1. Tsi1 connects to Hub1. The solution has been operational for 6 months.
Tsi1 is configured as shown in the following exhibit.
Hub1 receives 1 million messages per day. Each message is up to 1 KB and is formatted as JSON.
Hub1 has seven days of retained telemetry.
For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Reference:
https://docs.microsoft.com/en-us/azure/time-series-insights/time-series-insights-overview
NEW QUESTION 27
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 an Azure IoT solution that includes an Azure IoT hub, a Device Provisioning Service instance, and
1,000 connected IoT devices.
All the IoT devices are provisioned automatically by using one enrollment group.
You need to temporarily disable the IoT devices from the connecting to the IoT hub.
Solution: From the Device Provisioning Service, you disable the enrollment group, and you disable device entries in the identity registry of the IoT hub to which the IoT devices are provisioned.
Does the solution meet the goal?
- A. No
- B. Yes
Answer: B
Explanation:
You may find it necessary to deprovision devices that were previously auto-provisioned through the Device Provisioning Service.
In general, deprovisioning a device involves two steps:
1. Disenroll the device from your provisioning service, to prevent future auto-provisioning. Depending on whether you want to revoke access temporarily or permanently, you may want to either disable or delete an enrollment entry.
2. Deregister the device from your IoT Hub, to prevent future communications and data transfer. Again, you can temporarily disable or permanently delete the device's entry in the identity registry for the IoT Hub where it was provisioned.
Reference:
https://docs.microsoft.com/bs-latn-ba/azure/iot-dps/how-to-unprovision-devices
AZ-220
Number: AZ-220
Passing Score: 800
Time Limit: 120 min
File Version: 1
AZ-220
Implement the IoT solution infrastructure
Testlet 1
Case Study
This is a case study. Case studies are not timed separately. You can use as much exam time as you
would like to complete each case. However, there may be additional case studies and sections on this
exam. You must manage your time to ensure that you are able to complete all questions included on this exam
in the time provided.
To answer the questions included in a case study, you will need to reference information that is provided in the
case study. Case studies might contain exhibits and other resources that provide more information about the
scenario that is described in the case study. Each question is independent of the other question on this case
study.
At the end of this case study, a review screen will appear. This screen allows you to review your answers and
to make changes before you move to the next sections of the exam. After you begin a new section, you cannot
return to this section.
To start the case study
To display the first question on this case study, click the Next button. Use the buttons in the left pane to explore
the content of the case study before you answer the questions. Clicking these buttons displays information
such as business requirements, existing environment, and problem statements. If the case study has an All
Information tab, note that the information displayed is identical to the information displayed on the subsequent
tabs. When you are ready to answer a question, click the Question button to return to the question.
Existing Environment. Current State of Development
Contoso produces a set of Bluetooth sensors that read the temperature and humidity. The sensors connect to
IoT gateway devices that relay the data.
All the IoT gateway devices connect to an Azure IoT hub named iothub1.
Existing Environment. Device Twin
You plan to implement device twins by using the following JSON sample.
Existing Environment. Azure Stream Analytics
Each room will have between three to five sensors that will generate readings that are sent to a single IoT
gateway device. The IoT gateway device will forward all the readings to iothub1 at intervals of between 10 and
60 seconds.
You plan to use a gateway pattern so that each IoT gateway device will have its own IoT Hub device identity.
You draft the following query, which is missing the GROUP BYclause.
SELECT
AVG(temperature),
System.TimeStamp() AS AsaTime
FROM
Iothub
You plan to use a 30-second period to calculate the average temperature reading of the sensors.
You plan to minimize latency between the condition reported by the sensors and the corresponding alert issued
by the Stream Analytics job.
Existing Environment. Device Messages
The IoT gateway devices will send messages that contain the following JSON data whenever the temperature
exceeds a specified threshold.
The levelproperty will be used to route the messages to an Azure Service Bus queue endpoint named
criticalep.
Existing Environment. Issues
You discover connectivity issues between the IoT gateway devices and iothub1, which cause IoT devices to
lose connectivity and messages.
Requirements. Planning Changes
Contoso plans to make the following changes:
* Use Stream Analytics to process and view data.
* Use Azure Time Series Insights to visualize data.
* Implement a system to sync device statuses and required settings.
* Add extra information to messages by using message enrichment.
* Create a notification system to send an alert if a condition exceeds a specified threshold.
* Implement a system to identify what causes the intermittent connection issues and lost messages.
Requirements. Technical Requirements
Contoso must meet the following requirements:
* Use the built-in functions of IoT Hub whenever possible.
* Minimize hardware and software costs whenever possible.
* Minimize administrative effort to provision devices at scale.
* Implement a system to trace message flow to and from iothub1.
* Minimize the amount of custom coding required to implement the planned changes.
* Prevent read operations from being negatively affected when you implement additional services.
Implement the IoT solution infrastructure
Question Set 2
NEW QUESTION 28
You have an Azure IoT hub.
You need to recommend a solution to scale the IoT hub automatically.
What should you include in the recommendation?
- A. Configure autoscaling in Azure Monitor.
- B. Create an SMS alert in IoT Hub for the Total number of messages used metric.
- C. Create an Azure function that retrieves the quota metrics of the IoT hub.
- D. Emit custom metrics from the IoT device code and create an Azure Automation runbook alert.
Answer: C
Explanation:
Note: IoT Hub is scaled and priced based on an allowed number of messages per day across all devices connected to that IoT Hub. If you exceed the allowed message threshold for your chosen tier and number of units, IoT Hub will begin rejecting new messages. To date, there is no built-in mechanism for automatically scaling an IoT Hub to the next level of capacity if you approach or exceed that threshold.
Reference:
https://docs.microsoft.com/en-us/samples/azure-samples/iot-hub-dotnet-autoscale/iot-hub-dotnet-autoscale/
NEW QUESTION 29
You have three Azure IoT hubs named Hub1, Hub2, and Hub3, a Device Provisioning Service instance, and an IoT device named Device1.
Each IoT hub is deployed to a separate Azure region. Device enrollment uses the Lowest latency allocation policy.
The Device Provisioning Service uses the Lowest latency allocation policy. Device1 is auto-provisioned to Hub1 by using the Device Provisioning Service. Device1 regularly moves between regions.
You need to ensure that Device1 always connects to the IoT hub that has the lowest latency. What should you do?
- A. Configure device attestation that uses X.509 certificates.
- B. Disenroll and reenroll Device1.
- C. Implement device certificate rolling.
- D. Configure the re-provisioning policy.
Answer: D
Explanation:
Explanation
Automated re-provisioning support.
Microsoft added first-class support for device re-provisioning which allows devices to be reassigned to a different IoT solution sometime after the initial solution assignment. Re-provisioning support is available in two options:
Factory reset, in which the device twin data for the new IoT hub is populated from the enrollment list instead of the old IoT hub. This is common for factory reset scenarios as well as leased device scenarios. Migration, in which device twin data is moved from the old IoT hub to the new IoT hub. This is common for scenarios in which a device is moving between geographies.
Reference:
https://azure.microsoft.com/en-us/blog/new-year-newly-available-iot-hub-device-provisioning-service-features/
NEW QUESTION 30
How should you complete the GROUP BY clause to meet the Streaming Analytics requirements?
- A. GROUP BY HoppingWindow(Second, 60, 30)
- B. GROUP BY TumblingWindow(Second, 30)
- C. GROUP BY SessionWindow(Second, 30, 60)
- D. GROUP BY SlidingWindow(Second, 30)
Answer: B
Explanation:
Scenario: You plan to use a 30-second period to calculate the average temperature reading of the sensors.
Tumbling window functions are used to segment a data stream into distinct time segments and perform a function against them, such as the example below. The key differentiators of a Tumbling window are that they repeat, do not overlap, and an event cannot belong to more than one tumbling window.
InAnswers:
A: Hopping window functions hop forward in time by a fixed period. It may be easy to think of them as Tumbling windows that can overlap, so events can belong to more than one Hopping window result set.
Reference:
https://docs.microsoft.com/en-us/azure/stream-analytics/stream-analytics-window-functions
NEW QUESTION 31
You are planning a proof of concept (POC) that will use an Azure IoT hub.
You have two self-signed client authentication certificates named Cert1 and Cert2. Cert1 has a basic constraint that contains Subject Type=C You need to identify which certificates to use.
What should you identify? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.
Answer:
Explanation:
Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/concepts-x509-attestation
NEW QUESTION 32
You have an Azure IoT Edge device.
You need to modify the credentials used to access the container registry. What should you modify?
- A. the Azure IoT Hub device twin
- B. the IoT Edge module
- C. the $edgeAgent module twin
- D. the @edgeHub module twin
Answer: C
Explanation:
The module twin for the IoT Edge agent is called $edgeAgent and coordinates the communications between the IoT Edge agent running on a device and IoT Hub. The desired properties are set when applying a deployment manifest on a specific device as part of a single-device or at-scale deployment.
These properties include: runtime.settings.registryCredentials.{registryId}.username runtime.settings.registryCredentials.registryId}.password Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/module-edgeagent-edgehub
NEW QUESTION 33
You need to configure Stream Analytics to meet the POV requirements.
What are two ways to achieve the goal? Each Answer presents a complete solution.
NOTE: Each correct selection is worth one point.
- A. From IoT Hub, create a custom event hub endpoint, and then configure the endpoint as an input to Stream Analytics.
- B. Create an input in Stream Analytics that uses the built-in events endpoint of IoT Hub as the source.
- C. Route telemetry to an Azure Blob storage custom endpoint, and then configure the Blob storage as a reference input for Stream Analytics.
- D. Create a Stream Analytics module, and then deploy the module to all IoT Edge devices in the fleet.
Answer: A,B
Explanation:
NEW QUESTION 34
You have IoT devices that connect to an Azure IoT hub.
From IoT Hub, you create an Event subscription to be notified when devices are registered to IoT Hub. You select webhook endpoint as a handler for the Event subscription.
Which two types of Event Grid messages will be received by the webhook? Each correct answer presents a complete solution.
NOTE: Each correct selection is worth one point.
- A. Microsoft.Resources.ResourceWriteSuccess
- B. Microsoft.Devices.DeviceCreated
- C. Microsoft.EventGrid.SubscriptionValidationEvent
- D. Microsoft.Devices.DeviceConnected
Answer: B,C
Explanation:
Explanation
Microsoft.Devices.DeviceCreated: Published when a device is registered to an IoT hub.
The first thing you want to do is handle Microsoft.EventGrid.SubscriptionValidationEvent events. Every time someone subscribes to an event, Event Grid sends a validation event to the endpoint with a validationCode in the data payload.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-event-grid
https://docs.microsoft.com/en-us/azure/event-grid/receive-events
NEW QUESTION 35
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 an Azure IoT solution that includes an Azure IoT hub, a Device Provisioning Service instance, and
1,000 connected IoT devices.
All the IoT devices are provisioned automatically by using one enrollment group. You need to temporarily disable the IoT devices from the connecting to the IoT hub.
Solution: From the Device Provisioning Service, you disable the enrollment group, and you disable device entries in the identity registry of the IoT hub to which the IoT devices are provisioned.
Does the solution meet the goal?
- A. No
- B. Yes
Answer: B
Explanation:
Explanation
You may find it necessary to deprovision devices that were previously auto-provisioned through the Device Provisioning Service.
In general, deprovisioning a device involves two steps:
1.Disenroll the device from your provisioning service, to prevent future auto-provisioning. Depending on whether you want to revoke access temporarily or permanently, you may want to either disable or delete an enrollment entry.
2.Deregister the device from your IoT Hub, to prevent future communications and data transfer. Again, you can temporarily disable or permanently delete the device's entry in the identity registry for the IoT Hub where it was provisioned.
Reference:
https://docs.microsoft.com/bs-latn-ba/azure/iot-dps/how-to-unprovision-devices
NEW QUESTION 36
You have an Azure IoT solution that includes multiple Azure IoT hubs in different geographic locations and a single Device Provision Service instance.
You need to configure device enrollment to assign devices to the appropriate IoT hub based on the following requirements:
* The registration ID of the device
* The geographic location of the device
The load between the IoT hubs in the same geographic location must be balanced.
What should you use to assign the devices to the IoT hubs?
- A. Static configuration (via enrollment list only)
- B. Lowest latency
- C. Custom (Use Azure Function)
- D. Evenly weighted distribution
Answer: A
Explanation:
Explanation
Set the Device Provisioning Service allocation policy
The allocation policy is a Device Provisioning Service setting that determines how devices are assigned to an IoT hub. There are three supported allocation policies:
* Lowest latency: Devices are provisioned to an IoT hub based on the hub with the lowest latency to the
* device.
* Evenly weighted distribution (default): Linked IoT hubs are equally likely to have devices provisioned to them. This is the default setting. If you are provisioning devices to only one IoT hub, you can keep this setting.
* Static configuration via the enrollment list: Specification of the desired IoT hub in the enrollment list takes priority over the Device Provisioning Service-level allocation policy.
Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/tutorial-provision-multiple-hubs
NEW QUESTION 37
What should you do to identify the cause of the connectivity issues?
- A. Enable the collection of the Connections diagnostics logs and set up alerts for the connected devices count metric.
- B. Send cloud-to-device messages to the IoT devices.
- C. Monitor the connection status of the device twin by using an Azure function.
- D. Use the heartbeat pattern to send messages from the IoT devices to iothub1.
Answer: A
Explanation:
Explanation
Scenario: You discover connectivity issues between the IoT gateway devices and iothub1, which cause IoT devices to lose connectivity and messages.
To log device connection events and errors, turn on diagnostics for IoT Hub. We recommend turning on these logs as early as possible, because if diagnostic logs aren't enabled, when device disconnects occur, you won't have any information to troubleshoot the problem with.
Step 1:
1.Sign in to the Azure portal.
2.Browse to your IoT hub.
3.Select Diagnostics settings.
4.Select Turn on diagnostics.
5.Enable Connections logs to be collected.
6.For easier analysis, turn on Send to Log Analytics (see pricing).
Step 2:
Set up alerts for device disconnect at scale
To get alerts when devices disconnect, configure alerts on the Connected devices (preview) metric.
Reference:
https://docs.microsoft.com/bs-cyrl-ba/azure/iot-hub/iot-hub-troubleshoot-connectivity
NEW QUESTION 38
You create an Azure IoT hub by running the following command.
az iot hub create --resource-group MyResourceGroup --name MyIotHub --sku B1 -- location westus --partition-count 4 What does MylotHub support?
- A. device twins
- B. Device Provisioning Service
- C. cloud-to-device messaging
- D. Azure IoT Edge
Answer: B
Explanation:
The Device Provisioning Service is included in the Basic Tiers (such as B1).
Incorrect Answers:
B, C, D: The Standard tier is needed for cloud-to-device messaging, Azure IoT Edge, and device twins.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-scaling
Topic 2, Contoso
Existing Environment
Current State of Development
Contoso produces a set of Bluetooth sensors that read the temperature and humidity. The sensors connect to IoT gateway devices that relay the data.
All the IoT gateway devices connect to an Azure IoT hub named iothub1.
Existing Environment. Device Twin
You plan to implement device twins by using the following JSON sample.
Existing Environment. Azure Stream Analytics
Each room will have between three to five sensors that will generate readings that are sent to a single IoT gateway device. The IoT gateway device will forward all the readings to iothub1 at intervals of between 10 and 60 seconds.
You plan to use a gateway pattern so that each IoT gateway device will have its own IoT Hub device identity.
You draft the following query, which is missing the GROUP BY clause.
SELECT
AVG(temperature),
System.TimeStamp() AS AsaTime
FROM
Iothub
You plan to use a 30-second period to calculate the average temperature reading of the sensors.
You plan to minimize latency between the condition reported by the sensors and the corresponding alert issued by the Stream Analytics job.
Existing Environment. Device Messages
The IoT gateway devices will send messages that contain the following JSON data whenever the temperature exceeds a specified threshold.
The level property will be used to route the messages to an Azure Service Bus queue endpoint named criticalep.
Existing Environment. Issues
You discover connectivity issues between the IoT gateway devices and iothub1, which cause IoT devices to lose connectivity and messages.
Requirements. Planning Changes
Contoso plans to make the following changes:
Use Stream Analytics to process and view data.
Use Azure Time Series Insights to visualize data.
Implement a system to sync device statuses and required settings.
Add extra information to messages by using message enrichment.
Create a notification system to send an alert if a condition exceeds a specified threshold.
Implement a system to identify what causes the intermittent connection issues and lost messages.
Requirements. Technical Requirements
Contoso must meet the following requirements:
Use the built-in functions of IoT Hub whenever possible.
Minimize hardware and software costs whenever possible.
Minimize administrative effort to provision devices at scale.
Implement a system to trace message flow to and from iothub1.
Minimize the amount of custom coding required to implement the planned changes.
Prevent read operations from being negatively affected when you implement additional services.
NEW QUESTION 39
You have an Azure IoT solution that includes an Azure IoT hub, a Device Provisioning Service instance, and 1,000 connected IoT devices. The IoT devices are allocated to tour enrollment groups. Each enrollment group is configured to use certificate attestation.
You need to decommission all the devices in a single enrollment group and the enrollment group itself.
Which three actions should you perform in sequence? To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.
Answer:
Explanation:
1 - Disable the enrollment group
2 - delete each device from the identity registry.
3 - Delete the enrollment group.
Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/how-to-unprovision-devices
NEW QUESTION 40
You use Azure Security Center in an Azure IoT solution.
You need to exclude some security events. The solution must minimize development effort. What should you do?
- A. Create an azureiotsecurity module twin and add configuration details to the module twin object.
- B. Add a configuration to the code of the physical IoT device.
- C. Create an Azure function to filter security messages.
- D. Add configuration details to the device twin object.
Answer: A
Explanation:
Explanation
Properties related to every Azure Security Center for IoT security agent are located in the agent configuration object, within the desired properties section, of the azureiotsecurity module.
To modify the configuration, create and modify this object inside the azureiotsecurity module twin identity.
Note: Azure Security Center for IoT's security agent twin configuration object is a JSON format object. The configuration object is a set of controllable properties that you can define to control the behavior of the agent.
These configurations help you customize the agent for each scenario required. For example, automatically excluding some events, or keeping power consumption to a minimal level are possible by configuring these properties.
Reference:
https://docs.microsoft.com/en-us/azure/asc-for-iot/how-to-agent-configuration
NEW QUESTION 41
You have an Azure IoT solution that includes an Azure IoT hub.
You plan to deploy 10,000 IoT devices.
You need to validate the performance of the IoT solution while 10,000 concurrently connected devices stream telemetry. The solution must minimize effort.
What should you deploy?
- A. an Azure IoT Edge gateway configured as a protocol translation gateway
- B. Azure IoT Central application and a template for the retail industry
- C. an Azure IoT Device Simulation from Azure IoT Solution Accelerator
- D. an Azure function, an IoT Hub device SDK, and a timer trigger
Answer: C
Explanation:
The IoT solution accelerators are complete, ready-to-deploy IoT solutions that implement common IoT scenarios. The scenarios include connected factory and device simulation.
Use the Device Simulation solution accelerator to run simulated devices that generate realistic telemetry. You can use this solution accelerator to test the behavior of the other solution accelerators or to test your own custom IoT solutions.
Reference:
https://docs.microsoft.com/en-us/azure/iot-accelerators/about-iot-accelerators
Topic 1, ADatum
Requirements
Planned Changes
ADatum is developing an Azure IoT solution to monitor environmental conditions. The IoT solution consists of hardware devices and cloud services. All the devices will communicate directly to Azure IoT Hub.
The hardware devices will be deployed to the branch offices and will collect data about various environmental conditions such as temperature, humidity, air quality, and noise level. The devices will be wired by using Power over Ethernet (PoE) connections.
ADatum is developing the solution in the following three phases: proof of value (POV), pilot, and production.
Requirements. POV Requirements
The POV phase will demonstrate that a technical solution is viable. During this phase, 100 devices will be deployed to the main office and Azure Stream Analytics will be connected to an IoT hub to generate real-time alerts. Stream Analytics will perform the following processing:
Calculate the median rate of the telemetry across the entire devices that exceed the median rate by a factor of 4.
Compare the current telemetry to the specified thresholds and issue alerts when telemetry values are out of range.
Ensure that all message content during this phase is human readable to simplify debugging.
Requirements. Pilot Requirements
During the pilot phase, devices will be deployed to 10 offices. Each office will have up to 1,000 devices.
During this phase, you will add Azure Time Series Insights in parallel to Stream Analytics to support real-time graphs and queries in a dashboard web app.
The pilot deployment must minimize operating costs.
Requirements. Production Requirements
The production phase will include all the offices.
The production deployment will have one IoT hub in each Azure region. Devices must connect to the IoT hub in their region.
The production phase must meet the following requirements:
Ensure that the IoT solution can support performance and scale targets.
Ensure that the IoT solution support up to 1,000 devices per office.
Minimize operating costs of the IoT solution.
Requirements. Technical Requirements
Datum identifies the following requirements for the planned IoT solution:
The solution must generate real-time alerts when a fire condition is detected in an office. All the devices in that office must trigger an audible alarm siren within 10 seconds of the alert.
A dashboard UI must display alerts and the system status in real time and must allow device operators to make adjustments to the system.
Each device will send hourly updates to IoT Hub. Condition alerts will be sent immediately.
Multiple types of devices will collect telemetry that has different schemas.
IoT Hub must perform message routing based on the message body.
Direct methods must be used for cloud-to-device communication.
Reports must be provided monthly, quarterly, and annually.
Stored data queries must be as efficient as possible.
The device message size will be under 4 KB.
Development effort must be minimized.
Requirements. Throttle and Quotas
The relevant throttles and quotas for various IoT Hub tiers are shown in the following table.
Requirements. IoT Hub Routing
You plan to implement IoT Hub routing during the POV phase as shown in the following exhibit.
NEW QUESTION 42
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