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>> AZ-220認定試験トレーリング <<

AZ-220基礎問題集、AZ-220試験問題解説集

Microsoft Azure IoT Developer AZ-220は、技術的な精度の最高水準を高め、認定された主題と専門家のみを使用します。最新の正確なAZ-220試験トレントをクライアントに提供し、提供する質問と回答は実際の試験に基づいています。合格率が高く、約98％-100％であることをお約束します。また、AZ-220テストブレインダンプは高いヒット率を高め、試験を刺激してAZ-220試験の準備を整えることができます。あなたの成功は、AZ-220試験問題に縛られています。

Microsoft Azure IoT Developer 認定 AZ-220 試験問題 (Q56-Q61):

質問 # 56
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/azureiotedge-hub:1.0
• B. mcr.microsoft.com/azureiotedge-simulated-temperature-sensor:1.0
• C. mcr.microsoft.com/azureiotedge-agent:1.0
• D. mycr.azurecr.io/temperature-module:latest
• E. mcr.microsoft.com/iotedgedev:2.0

正解：A、C、D

解説：
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
Process and manage data
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 questions in 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 section 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 in 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.
Overview
A company named Contoso, Ltd. is creating a building monitoring system that will monitor the temperature, humidity, and light level at various points in a building's internal structure.
Contoso will test the system at a single building located in the United Kingdom. The building has 25 floors.
Each floor has 15 rooms.
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. Planned 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 technical 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.

質問 # 57
You have 100 devices that connect to an Azure IoT hub.
You need to be notified about failed local logins to a subnet of the devices.
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 - Enable Azure Security Center for IoT
2 - Select a device security group
Reference:
https://docs.microsoft.com/bs-latn-ba/azure/asc-for-iot/how-to-security-data-access
https://docs.microsoft.com/en-us/rest/api/securitycenter/devicesecuritygroups/createorupdate

質問 # 58
You have an Azure IoT hub that uses a Device Provisioning Service instance.
You create a new individual device enrollment that uses symmetric key attestation.
Which detail from the enrollment is required to auto provision the device by using the Device Provisioning Service?

• A. the primary key of the enrollment
• B. the device identity of the IoT hub
• C. the registration ID of the enrollment
• D. the hostname of the IoT hub

正解：B

解説：
Explanation
An enrollment is the record of devices or groups of devices that may register through auto-provisioning. The enrollment record contains information about the device or group of devices, including:
the attestation mechanism used by the device
the optional initial desired configuration desired IoT hub
the desired device ID
Note: Azure IoT auto-provisioning can be broken into three phases:
1.Service configuration - a one-time configuration of the Azure IoT Hub and IoT Hub Device Provisioning Service instances, establishing them and creating linkage between them.
2.Device enrollment - the process of making the Device Provisioning Service instance aware of the devices that will attempt to register in the future. Enrollment is accomplished by configuring device identity information in the provisioning service, as either an "individual enrollment" for a single device, or a "group enrollment" for multiple devices.
3.Device registration and configuration
Reference:
https://docs.microsoft.com/en-us/azure/iot-dps/concepts-service#enrollment

質問 # 59
You need to recommend the format of telemetry messages to meet the POV requirements.
What should you recommend?

• A. XML
• B. Avro
• C. JSON

正解：C

解説：
Scenario: POV Requirements
Ensure that all message content during this phase is human readable to simplify debugging.
Avro uses a binary format, so it is not human readable.
The more lightweight JSON (Javascript object notation) has become a popular alternative to XML for various reasons. A couple obvious ones are:
Less verbose- XML uses more words than necessary
JSON is faster- Parsing XML software is slow and cumbersome.
Reference:
https://blog.cloud-elements.com/json-better-xml

質問 # 60
You have an Azure IoT solution that contains an Azure IoT hub.
You need to ensure that the IoT hub configuration is compliant with the Health Insurance Portability and Accountability Act (HIPAA) audit logging requirements.
What should you use?

• A. an Azure Sentinel workspace
• B. Azure Monitor alerts
• C. Azure Advisor recommendations
• D. an Azure Policy definition

正解：D

解説：
Explanation
Regulatory Compliance in Azure Policy provides Microsoft created and managed initiative definitions, known as built-ins, for the compliance domains and security controls related to different compliance standards, including HIPAA auditing logging.
Reference:
https://docs.microsoft.com/en-us/azure/iot-hub/security-controls-policy

質問 # 61
......

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