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Microsoft DP-420 자격증 시험은 클라우드 컴퓨팅 분야에서 경력을 발전시키고자 하는 전문가들에게 훌륭한 기회입니다. 이 자격증을 취득함으로써 Azure Cosmos DB 및 클라우드 네이티브 애플리케이션 개발에 대한 전문성을 증명할 수 있으며, 경쟁이 심한 취업 시장에서 눈에 띄며 새로운 진로 기회를 열 수 있습니다.

DP-420 자격증 시험은 Azure Cosmos DB 데이터 모델링, 파티셔닝, 인덱싱 및 쿼리 등 다양한 주제에 대한 후보자의 지식을 테스트하기 위해 설계되었습니다. 또한 Azure Functions, Azure Event Hubs, Azure Stream Analytics 및 Azure Cosmos DB Change Feed와 관련된 개념도 다룹니다. 이 시험은 Azure Cosmos DB 작업 경험이 있으며 클라우드 컴퓨팅 개념과 원칙에 대해 잘 알고 있는 전문가를 대상으로 합니다.

Microsoft DP-420 인증 시험은 Azure Cosmos DB를 사용하여 클라우드 네이티브 애플리케이션을 설계하고 구현하는 기술과 지식을 검증하고 싶은 전문가들을 대상으로 합니다. 이 시험은 데이터 모델링, 파티셔닝, 인덱싱, 쿼리 및 튜닝 등 Azure Cosmos DB와 관련된 다양한 주제를 다룹니다. 후보자들은 클라우드 네이티브 애플리케이션 개발 경험과 Azure 서비스에 대한 강력한 이해력을 갖추어 이 시험에 대비해야 합니다. Microsoft는 DP-420 시험을 준비하기 위한 다양한 교육 자원을 제공합니다.

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최신 Azure Cosmos DB Developer Specialty DP-420 무료샘플문제 (Q127-Q132):

질문 # 127
You have a multi-region Azure Cosmos DB account named account1 that has a default consistency level of strong.
You have an app named App1 that is configured to request a consistency level of session.
How will the read and write operations of App1 be handled? To answer, select the appropriate options in the answer area.
NOTE: Each correct selection is worth one point.

정답：

설명：

Explanation
Box 1 = Write and replicate data to every region synchronously
This is because the write concern is mapped to the default consistency level configured on your Azure Cosmos DB account2, which is strong in this case. Strong consistency ensures that every write operation is synchronously committed to every region associated with your Azure Cosmos DB account1. The request level consistency level of session only applies to the read operations of App11.
Box 2: That has the lowest estimated latency to the client
This is because the read operations of App1 will use the session consistency level that is specified in the request options. Session consistency is a client-centric consistency model that guarantees monotonic reads, monotonic writes, and read-your-own-writes within a session. A session is scoped to a client connection or a stored procedure execution. Session consistency allows clients to read from any region that has the lowest latency to the client.

질문 # 128
You plan to use a multi-region Azure Cosmos DB for NoSQL account to store data for a new application suite.
The suite contains the applications shown in the following table.

Each application should use the weakest consistency level possible.
Which consistency level should you configure for each application? To answer, select the appropriate options in the answer area. NOTE: Each correct selection is worth one point.

정답：

설명：

Explanation

질문 # 129
You have an Azure Cosmos DB for NoSQL account1 that is configured for automatic failover. The account1 account has a single read-write region in West US and a and a read region in East US.
You run the following PowerShell command.

What is the effect of running the command?

A. The account will be unavailable to writes during the change.
B. The account will be configured for multi-region writes.
C. The provisioned throughput for account1 will increase.
D. A manual failover will occur.

정답：A

설명：
You can use the Set-AzCosmosDBAccountRegion cmdlet to update the regions that an Azure Cosmos DB account uses. You can use this cmdlet to add a region or change the region failover order. The cmdlet requires a resource group name, an Azure Cosmos DB account name, and a list of regions in desired failover order1.
For your scenario, based on the PowerShell command, you are using the Set-AzCosmosDBAccountRegion cmdlet to update the regions for an Azure Cosmos DB account named account1 that is configured for automatic failover. The command specifies two regions: West US and East US. The effect of running the command is that the account will be configured for multi-region writes.
Multi-region writes is a feature of Azure Cosmos DB that allows you to write data to any region in your account and have it automatically replicated to all other regions. This feature provides high availability and low latency for write operations across multiple regions. To enable multi-region writes, you need to specify at least two regions in your account and set them as write regions2. In your command, you are setting both West US and East US as write regions by using the -IsZoneRedundant parameter with a value of $true for both regions.

질문 # 130
You configure multi-region writes for account1.
You need to ensure that App1 supports the new configuration for account1. The solution must meet the business requirements and the product catalog requirements.
What should you do?

A. Create a private endpoint connection.
B. Set the default consistency level of accountl to bounded staleness.
C. Modify the connection policy of App1.
D. Increase the number of request units per second (RU/s) allocated to the con-product and con-productVendor containers.

정답：D

설명：
Explanation
App1 queries the con-product and con-productVendor containers.
Note: Request unit is a performance currency abstracting the system resources such as CPU, IOPS, and memory that are required to perform the database operations supported by Azure Cosmos DB.
Scenario:
Develop an app named App1 that will run from all locations and query the data in account1.
Once multi-region writes are configured, maximize the performance of App1 queries against the data in account1.
Whenever there are multiple solutions for a requirement, select the solution that provides the best performance, as long as there are no additional costs associated.
Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/consistency-levels

질문 # 131
You have an Azure Cosmos DB Core (SQL) API account that is configured for multi-region writes. The account contains a database that has two containers named container1 and container2.
The following is a sample of a document in container1:
{
"customerId": 1234,
"firstName": "John",
"lastName": "Smith",
"policyYear": 2021
}
The following is a sample of a document in container2:
{
"gpsId": 1234,
"latitude": 38.8951,
"longitude": -77.0364
}
You need to configure conflict resolution to meet the following requirements:
For container1 you must resolve conflicts by using the highest value for policyYear.
For container2 you must resolve conflicts by accepting the distance closest to latitude: 40.730610 and longitude: -73.935242.
Administrative effort must be minimized to implement the solution.
What should you configure for each container? To answer, drag the appropriate configurations to the correct containers. Each configuration 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.

정답：

설명：

Reference:
https://docs.microsoft.com/en-us/azure/cosmos-db/conflict-resolution-policies
https://docs.microsoft.com/en-us/azure/cosmos-db/sql/how-to-manage-conflicts

질문 # 132
......

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