Microsoft AZ-220テストエンジン問題集トレーニングには205問あります [Q110-Q134]

Microsoft AZ-220テストエンジン問題集トレーニングには205問あります

AZ-220問題一発合格させる問題集はMicrosoft Certified: Azure IoT Developer Specialty認定

AZ-220試験に合格するには、Azure IoTサービスとソリューション、およびC＃、node.js、Pythonなどのプログラミング言語の知識を十分に理解する必要があります。また、Visual Studio CodeやAzure CLIなどのAzure IoT開発ツールを使用した経験も必要です。 Azure IoT開発者としてのキャリアを追求することに興味がある場合は、AZ-220試験に合格することは、目標を達成するための不可欠なステップです。

Microsoft AZ-220（Microsoft Azure IoT Developer）認定試験は、キャリアを向上させたいIoT開発者にとって重要な認定試験です。この試験は、Azureプラットフォーム上でのIoTソリューションの開発と展開に関連する幅広いトピックをカバーしており、合格することで候補者のAzure IoTサービスに対する専門知識が証明されます。この認定は世界的に認められており、IoT開発における多数のキャリアチャンスをもたらすことができます。

質問 # 110
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

正解：B

解説：
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

質問 # 111
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

正解：B

解説：
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

質問 # 112
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.

正解：

解説：

Explanation
Text, letter Description automatically generated

Reference:
https://docs.microsoft.com/en-us/azure/time-series-insights/time-series-insights-overview

質問 # 113
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. Create an SMS alert in IoT Hub for the Total number of messages used metric.
B. Emit custom metrics from the IoT device code and create an Azure Automation runbook alert.
C. Configure autoscaling in Azure Monitor.
D. Create an Azure function that retrieves the quota metrics of the IoT hub.

正解：D

解説：
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/

質問 # 114
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 an Azure Stream Analytics job that receives input from an Azure IoT hub and sends the outputs to Azure Blob storage. The job has compatibility level 1.1 and six streaming units.
You have the following query for the job.

You plan to increase the streaming unit count to 12.
You need to optimize the job to take advantage of the additional streaming units and increase the throughput.
Solution: You change the compatibility level of the job to 1.2.
Does this meet the goal?

A. No
B. Yes

正解：A

解説：
Explanation
Max number of Streaming Units with one step and with no partitions is 6.
Reference:
https://docs.microsoft.com/en-us/azure/stream-analytics/stream-analytics-parallelization

質問 # 115
Your company is creating a new camera security system that will use Azure IoT Hub.
You plan to use an Azure IoT Edge device that will run Ubuntu Server 18.04.
You need to configure the IoT Edge device.
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.

正解：

解説：

Explanation

Step 1: Run the following commands
Install the container runtime.
Azure IoT Edge relies on an OCI-compatible container runtime. For production scenarios, we recommended that you use the Moby-based engine provided below. The Moby engine is the only container engine officially supported with Azure IoT Edge. Docker CE/EE container images are compatible with the Moby runtime.
Install the Moby engine.
sudo apt-get install moby-engine
Install the Moby command-line interface (CLI). The CLI is useful for development but optional for production deployments.
sudo apt-get install moby-cli
Install the security daemon. The package is installed at /etc/iotedge/.
sudo apt-get install iotedge
Step 2: From Iot Hub,create an IoT Edge device registry entry.
Note: In your IoT Hub in the Azure portal, IoT Edge devices are created and managed separately from IOT devices that are not edge enabled.
* Sign in to the Azure portal and navigate to your IoT hub.
* In the left pane, select IoT Edge from the menu.
* Select Add an IoT Edge device.
* Provide a descriptive device ID. Use the default settings to auto-generate authentication keys and connect the new device to your hub.
* Select Save.
Retrieve the connection string in the Azure portal
1. When you're ready to set up your device, you need the connection string that links your physical device with its identity in the IoT hub.
2. From the IoT Edge page in the portal, click on the device ID from the list of IoT Edge devices.
3. Copy the value of either Primary Connection String or Secondary Connection String.
Step 3: Add the connection string to..
To manually provision a device, you need to provide it with a device connection string that you can create by registering a new device in your IoT hub.
Open the configuration file.
sudo nano /etc/iotedge/config.yaml
Find the provisioning configurations of the file and uncomment the Manual provisioning configuration section. Update the value of device_connection_string with the connection string from your IoT Edge device.
Save and close the file.
After entering the provisioning information in the configuration file, restart the daemon:
sudo systemctl restart iotedge
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/how-to-install-iot-edge-linux

質問 # 116
You have an Azure subscription that contains the resources shown in the following table.

You need to use a REST API calls to configure Hub1 to route all messages to container1.
What should you do first?

A. Retrieve the connection string of the storage account
B. Create an Azure Service Bus queue.
C. Create a routing endpoint.
D. Create a route.

正解：A

質問 # 117
You have the following device twin for the IoT device.

For each of the following statements, select Yes if the statement is true. Otherwise, select No.
NOTE: Each correct selection is worth one point.

正解：

解説：

Explanation

Box1: Yes
Box 2: Yes
Fanspeed 73 is a reported property.
Box 3: No
The deviceID property is read only.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/iot-hub-devguide-device-twins

質問 # 118
You are writing code to provision IoT devices by using the Device Provisioning Service.
Which two details from the Overview blade of the Device Provisioning Service are required to provision a new IoT client device? To answer, select the appropriate detail in the answer area.
NOTE: Each correct selection is worth one point.

正解：

解説：

Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/tutorial-set-up-device

質問 # 119
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?

A. No
B. Yes

正解：B

質問 # 120
You deploy an Azure IoT hub.
You need to demonstrate that the IoT hub can receive messages from a device.
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.

正解：

解説：

1 - Register a device in IoT Hub
2 - Configure the device connection string on a device client.
3 - Trigger a new send event from a device client.
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/how-to-register-device

質問 # 121
You have an Azure IoT solution that includes a basic tier Azure IoT hub named Hub1 and a Raspberry Pi device named Device1. Device1 connects to Hub1.
You back up Device1 and restore the backup to a new Raspberry Pi device.
When you start the new Raspberry Pi device, you receive the following error message in the diagnostic logs of Hub1: "409002 LinkCreationConflict." You need to ensure that Device1 and the new Raspberry Pi device can run simultaneously without error.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

A. Upgrade Hub1 to the standard tier.
B. From Hub1, create a new consumer group.
C. From Hub1, modify the device shared access policy.
D. On the new Raspberry Pi device, modify the connection string.
E. From Hub1, create a new IoT device.

正解：D、E

質問 # 122
You plan to deploy Azure Time Series Insights.
What should you create on iothub1 before you deploy Time Series Insights?

A. a new consumer group
B. a new message route
C. a new shared access policy
D. an IP filter rule

正解：A

解説：
Create a dedicated consumer group in the IoT hub for the Time Series Insights environment to consume from. Each Time Series Insights event source must have its own dedicated consumer group that isn't shared with any other consumer. If multiple readers consume events from the same consumer group, all readers are likely to exhibit failures.
Reference:
https://docs.microsoft.com/en-us/azure/time-series-insights/time-series-insights-how-to-add-an-event-source- iothub
Topic 3, Fabrikam
General Overview
Fabrikam, Inc. is an international food company that has a main office in London and 250 sites worldwide.
FabRIkam uses a prototype hydroponics loT management system that tracks temperatures and PH levels and adjusts conditions automatically.
Location
The prototype environment is deployed to the main office.
IoT Hub
The management system uses a free tier Azure loT hub.
Devices
The prototype contains the devices shown in the following table.

Each device will use the following:
* A common set of Azure loT Edge modules
* A unique module for each type of sensor or controller
Each device has a device twin. Each device twin contains a tag that identifies the device type. For example, the device twin of Child4 contains a tag of ph. Each device sends 1.440 4-KB messages to the loT hub per day.
Pilot deployment
A pilot of the hydroponics loT management system will be deployed initially to 50 of the company's worldwide sites.
Device Requirements
Fabrikam identifies the following device requirements:
* Cloud-to-device commands will be sent to each primary control device.
* All module communication from the child devices must be routed to the loT hub.
* The parameters of each device type must be configured in the loT Edge container configuration file.
* Device modules must be deployed to all the devices automatically, and then updated automatically. The solution must support targeted deployments by using device twin tags.
Networking Requirements
Fabrikam identifies the following networking requirements:
* Child devices will NOT have internet access.
* The primary control device in each site will have internet access.
* Child devices will communicate with their local primary control device by using the AMQP protocol.
Monitoring Requirements
Fabrikam identifies the following monitoring requirements:
* The number of device-to-cloud telemetry messages sent to the loT hub by the primary control devices must be tracked.
* An email notification must be sent if a message is NOT received from Child4 every 10 minutes.
Technical Requirements
Fabrikam identifies the following technical requirements:
* The solution must support cloud-to-device commands.
* Administrative effort must be minimized whenever possible.
* Hardware and software costs must be minimized whenever possible.
* Access to the loT hub must be restricted to devices that connect from the company's sites.

質問 # 123
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 schedule an IoT Hub job to update the twin tags and you query for job progress.
Does this meet the goal?

A. No
B. yes

正解：A

解説：
Explanation
Instead update the twin desired property and check the corresponding reported property.
Note: 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

質問 # 124
From the Device Provisioning Service, you create an enrollment as shown in the exhibit. (Click the Exhibit tab.)

You need to deploy a new IoT device.
What should you use as the device identity during attestation?

A. the random string of alphanumeric characters
B. a self-signed X.509 certificate
C. the endorsement key of the device's Trusted Platform Module (TPM)
D. the HMACSHA256 hash of the device's registration ID

正解：D

解説：
Explanation
Each device uses its derived device key with your unique registration ID to perform symmetric key attestation with the enrollment during provisioning. To generate the device key, use the key you copied from your DPS enrollment to compute an HMAC-SHA256 of the unique registration ID for the device and convert the result into Base64 format.
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/how-to-auto-provision-symmetric-keys

質問 # 125
You have 100 devices that connect to an Azure IoT hub.
You plan to use Azure functions to process all the telemetry messages from the devices before storing the messages.
You need to configure the functions binding for the IoT hub.
Which two configuration details should you use to configure the binding? Each Answer presents part of the solution.
NOTE: Each correct selection is worth one point.

A. the IoT hub's connection string shared access key that has Service connect permissions
B. the name of the resource group that contains the IoT hub
C. the Azure Event-Hub compatible name
D. the connection string of the Azure Event Hub-compatible endpoint from the IoT Hub built-in endpoints

正解：C、D

解説：
EventHubName: Functions 2.x and higher. The name of the event hub. When the event hub name is also present in the connection string, that value overrides this property at runtime.
Connection: The name of an app setting that contains the connection string to the event hub's namespace. Copy this connection string by clicking the Connection Information button for the namespace, not the event hub itself. This connection string must have send permissions to send the message to the event stream.
Reference:
https://docs.microsoft.com/en-us/azure/azure-functions/functions-bindings-event-iot-output

質問 # 126
You have an Azure Stream Analytics job that connects to an Azure IoT hub named Hub1445 as a streaming data source. Hub1445 is configured as shown in the exhibit. (Click the Exhibit tab.)

The Stream Analytics job fails to receive any messages from the IoT hub. What should you do to resolve the issue?

A. Disable the Route2 route.
B. Change the Route1 route query to true.
C. Enable the Route3 route.
D. Enable the fallback route.

正解：B

解説：
Explanation
The device telemetry is usually passed as JSON from the device through the IoT Hub - this is handled nicely by Azure Streaming Analytics queries.
The IoT Hub message routing should be configured as follows: Data source: Device Telemetry Messages Routing query: true (as the routing query is an expression that evaluates to true or false for each received message, the simplest way to send all messages to the endpoint is to just supply true as the query).
Reference:
https://darenmay.com/blog/azure-iot-streaming-analytics-data-lake-analytics-and-json/

質問 # 127
You have an Azure subscription that contains an Azure IoT hub, 500 IoT devices, and an Azure Time Series Insights Gen2 environment named Environment1.
You need to add calculated values to the Time Series Model.
What should you use?

A. hierarchies
B. types
C. instances

正解：B

解説：
Explanation
Time Series Model types help you define variables or formulas for doing computations. Types are associated with a specific instance.
A type can have one or more variables. For example, a Time Series Model instance might be of type Temperature Sensor, which consists of the variables avg temperature, min temperature, and max temperature.
Reference:
https://docs.microsoft.com/en-us/azure/time-series-insights/concepts-model-overview

質問 # 128
You have an Azure IoT Edge device named Edge1.
You need to configure the module container to link the module storage to the host storage.
How should you configure the deployment manifest? To answer, drag the appropriate keys to the correct targets. Each key may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.

正解：

解説：

Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/how-to-use-create-options

質問 # 129
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 an Azure IoT solution that includes an Azure IoT hub and an Azure IoT Edge device.
You plan to deploy 10 Bluetooth sensors. The sensors do not support MQTT, AMQP, or HTTPS.
You need to ensure that all the sensors appear in the IoT hub as a single device.
Solution: You configure the IoT Edge device as an IoT Edge transparent gateway. You configure the sensors to connect to the device.
Does this meet the goal?

A. No
B. Yes

正解：A

解説：
IoT Edge transparent gateways support only the MQTT or AMQP protocols.
Instead use a translation gateway.
IoT Hub. The translation module receives messages from downstream devices, translates them into a supported protocol, and then the IoT Edge device sends the messages on behalf of the downstream devices. All information looks like it is coming from one device, the gateway.
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/iot-edge-as-gateway

質問 # 130
You have an Azure IoT hub that has 1,000 registered devices.
You create an Azure logic app.
You need to send Device Connected and Device Disconnected events in real time to the logic app.
What should you do?

A. From the Diagnostic settings blade of the loT hub. add a diagnostic setting. Route the connection logs to a Log Analytics workspace.
B. From the Message routing blade of the loT hub. add a route. Route DeviceLifecycleEvents to an Azure Service Bus queue.
C. From the Events blade of the loThub. add an event subscription. Configure the Filter to Event Types setting and route the events to a webhook.

正解：C

解説：
Reference:
https://sandervandevelde.wordpress.com/2019/12/20/subscribe-your-iothub-to-eventgrid-as-event-source/

質問 # 131
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.

A. $event['p1'] != NULL
B. $event.p1.String = 'abc'
C. $event.p4.p5 = 0.0
D. $event.p2 = 'abc'

正解：A、B

解説：
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

質問 # 132
You have an Azure IoT Central application.
You need to connect IoT devices that use SAS tokens 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.

正解：

解説：

1 - Obtain the group primary key
2 - Generate device SAS Keys.
3 - Flash unique credentials to the devices.
4 - Connect the devices to IoT Central
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
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.

質問 # 133
You have an Azure IoT Edge device named Edge1.
You need to configure the module container to link the module storage to the host storage.
How should you configure the deployment manifest? To answer, drag the appropriate keys to the correct targets. Each key may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.
NOTE: Each correct selection is worth one point.