Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB (DP-420日本語版): DP-420 Exam

"Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB (DP-420日本語版)", also known as DP-420 exam, is a Microsoft Certification. With the complete collection of questions and answers, PrepPDF has assembled to take you through 206 Q&As to your DP-420 Exam preparation. In the DP-420 exam resources, you will cover every field and category in Azure Cosmos DB Developer Specialty Certification helping to ready you for your successful Microsoft Certification.

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  • Exam Code: DP-420
  • Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB (DP-420日本語版)
  • Certification Provider: Microsoft
  • Corresponding Certification: Azure Cosmos DB Developer Specialty
  • Updated: Nov 05, 2026
  • No. of Questions: 206 Questions & Answers with Testing Engine
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Skills measured

  • The English language version of this exam will be updated on August 4, 2022. Please download the exam skills outline below to see what’s changing.
  • Optimize an Azure Cosmos DB solution (15–20%)
  • Integrate an Azure Cosmos DB solution (5–10%)
  • Maintain an Azure Cosmos DB solution (25–30%)
  • Design and implement data models (35–40%)
  • Design and implement data distribution (5–10%)

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Reference: https://docs.microsoft.com/en-us/learn/certifications/exams/dp-420?WT.mc_id=Azure_blog-wwl

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Microsoft DP-420日本語 Exam Syllabus Topics:

SectionWeightObjectives
Optimize an Azure Cosmos DB solution15-20%- Design and implement change feeds
  • 1. Develop Azure Functions triggers
  • 2. Manage change feed instances
  • 3. Consume change feeds using SDK
  • 4. Implement aggregation persistence
- Define and implement indexing strategy
  • 1. Choose appropriate index types
  • 2. Choose read-heavy or write-heavy indexing
  • 3. Configure custom indexing policies
  • 4. Implement composite indexes
  • 5. Optimize index performance
- Optimize query performance
  • 1. Implement integrated cache
  • 2. Calculate query cost
  • 3. Adjust indexing policies
  • 4. Retrieve request unit cost
Design and implement data models35-40%- Design and implement a non-relational data model for Azure Cosmos DB for NoSQL
  • 1. Reference between documents
  • 2. Identify data and associated access patterns
  • 3. Store multiple entity types in the same container
  • 4. Denormalize data across documents
  • 5. Identify partition key, id, and unique keys
  • 6. Store multiple related entities in the same document
- Design a data partitioning strategy
  • 1. Evaluate cross-partition query cost
  • 2. Evaluate throughput and data distribution
  • 3. Choose a partition key
  • 4. Plan for transactions with partition keys
  • 5. Choose a partitioning strategy
  • 6. Implement synthetic partition keys
- Plan and implement sizing and scaling
  • 1. Evaluate global distribution costs
  • 2. Choose between serverless, provisioned, and free tier
  • 3. Design resource governance and scaling
  • 4. Evaluate throughput and storage requirements
  • 5. Configure throughput
- Implement server-side programming
  • 1. Implement triggers
  • 2. Implement user-defined functions
  • 3. Write and deploy stored procedures
- Implement data access
  • 1. Use consistency and query request options
  • 2. Implement SQL queries with arrays and aggregation
  • 3. Implement optimistic concurrency control
  • 4. Use SDKs for CRUD operations
  • 5. Implement patch operations
  • 6. Manage transactional batch operations
- Implement client connectivity options
  • 1. Choose gateway or direct connectivity mode
  • 2. Implement singleton client
  • 3. Use Azure Cosmos DB emulator
  • 4. Create database connections
  • 5. Handle connection errors
  • 6. Configure client-side threading and logging
Integrate an Azure Cosmos DB solution5-10%- Enable analytical workloads
  • 1. Enable analytical store
  • 2. Write data back from Spark
  • 3. Query analytical store from Synapse
  • 4. Configure Azure Cosmos DB Mirroring
- Implement solutions across services
  • 1. Integrate Azure Functions and Event Hubs
  • 2. Implement Azure AI Search integration
  • 3. Aggregate and archive data
  • 4. Use Change Feed for denormalization
  • 5. Enforce referential integrity
Design and implement data distribution5-10%- Design and implement replication strategy
  • 1. Choose a consistency model
  • 2. Evaluate consistency model impacts
  • 3. Perform manual failovers
  • 4. Choose when to distribute data
  • 5. Define automatic failover policies
- Design and implement multi-region writes
  • 1. Implement multi-region writes
  • 2. Choose when to use multi-region writes
  • 3. Implement conflict resolution policies
Maintain an Azure Cosmos DB solution25-30%- Monitor and troubleshoot Azure Cosmos DB solutions
  • 1. Monitor performance and availability
  • 2. Implement backup and recovery strategies
  • 3. Monitor metrics and logs
  • 4. Troubleshoot throughput issues

Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB (DP-420日本語版) Sample Questions:

あなたはaccount1という名前のAzure Cosmos DB Core(SQL)APIアカウントを持っています。
account1では、100GBのデータを含むコンテナ内で次のクエリを実行します。
選択 *
c から
WHERE LOWER(c.categoryid) = " hockey "
クエリを実行する際に、以下の指標が表示されます。

以下の各記述について、正しい場合は「はい」を選択してください。そうでない場合は「いいえ」を選択してください。
注：正解ごとに1ポイントが加算されます。

Reveal Solution  Discussion  0

Correct Answer:


Explanation:

Box 1: No
Each physical partition should have its own index, but since no index is used, the query is not cross-partition.
Box 2: No
Index utilization is 0% and Index Look up time is also zero.
Box 3: Yes
A partition key index will be created, and the query will perform across the partitions.
Reference: https://docs.microsoft.com/en-us/azure/cosmos-db/sql/how-to-query-container

DB1 という名前の Azure Cosmos DB for NoSQL データベースがあり、その中に Contained という名前のコンテナがあります。
Container! のパーティションキーは /city です。
あなたは、DB1 に顧客情報を保存する App1 という名前のクラウドネイティブアプリを開発しています。App1 はトランザクションバッチ操作を実行して、Contained 内のアイテムを更新します。
App1を以下の要件を満たすように設定する必要があります。
* アイテムのETag値が最後に読み取られてから変更された場合は、バッチ操作がロールバックされるようにしてください。
バッチ内のすべての操作が単一のパーティションキー値に適用されることを確認してください。
C#コードをどのように完成させるべきですか？回答するには、回答欄で適切なオプションを選択してください。
注：正解ごとに1ポイントが加算されます。

Reveal Solution  Discussion  0

Correct Answer:


Explanation:

Azure Cosmos DB for NoSQL アカウントに、複数リージョンへの書き込みが構成されたデータベースがあります。
コンテナーの競合解決ポリシーを実装するには、Azure Cosmos DB SDK を使用する必要があります。ソリューションは、競合フィードに送信されるすべての競合を確実に処理する必要があります。
解決策：ConflictResolutionModeをCustomに設定します。ResolutionProceduresをカスタムストアドプロシージャに設定します。カスタムストアドプロシージャを構成して、conflictingItemsパラメーターを使用して競合を解決するようにします。
これは目標を達成していると言えるでしょうか？

  • A. はい
  • B. いいえ
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

Explanation: Only visible for PrepPDF members. You can sign-up / login (it's free).

Azure Cosmos DB for NoSQL アカウントをお持ちです。このアカウントには、変更フィードが有効になっているコンテナがホストされています。Azure Cosmos DB SDK を使用してアプリを構築しています。このアプリは、プルモデルを使用して変更フィードからアイテムを読み取ります。複数のスレッドが並行して変更フィードを読み取ることができるようにする必要があります。何を含めるべきですか？

  • A. changeFeedStartFew の値
  • B. フィードレンジの値
  • C. ページサイズ値
  • D. ストリームベースのイテレータ
Reveal Solution  Discussion  0

Correct Answer: B  🗳️

Azure Cosmos DB Core (SQL) API アカウントにコンテナがあります。
楽観的同時実行制御を使用してドキュメントを置き換えるには、Azure Cosmos DB SDK を使用する必要があります。
コードには何を含めるべきですか？回答するには、回答欄で適切なオプションを選択してください。
注：正解ごとに1ポイントが加算されます。

Reveal Solution  Discussion  0

Correct Answer:


Explanation:

Box 1: ConsistencyLevel
The ItemRequestOptions Class ConsistencyLevel property gets or sets the consistency level required for the request in the Azure Cosmos DB service.
Azure Cosmos DB offers 5 different consistency levels. Strong, Bounded Staleness, Session, Consistent Prefix and Eventual - in order of strongest to weakest consistency.
Box 2: _etag
The ItemRequestOptions class helped us implement optimistic concurrency by specifying that we wanted the SDK to use the If-Match header to allow the server to decide whether a resource should be updated. The If- Match value is the ETag value to be checked against. If the ETag value matches the server ETag value, the resource is updated.
Reference:
https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.cosmos.itemrequestoptions
https://cosmosdb.github.io/labs/dotnet/labs/10-concurrency-control.html

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