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Microsoft Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB : DP-420

DP-420
  • Exam Code: DP-420
  • Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
  • Updated: Aug 22, 2026
  • Q & A: 281 Questions and Answers
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Exam DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB

Candidates for this exam must have solid knowledge and experience developing apps for Azure and working with Azure Cosmos DB database technologies. They should be proficient at developing applications by using the Core (SQL) API and SDKs, writing efficient queries and creating appropriate index policies, provisioning and managing resources in Azure, and creating server-side objects with JavaScript. They should be able to interpret JSON, read C# or Java code, and use PowerShell.

The English language version of this exam will be updated on August 4, 2022. Please download the skills measured document below to see what’s changing. If a localized version of this exam is available, it will be updated approximately eight weeks after this date.

Passing score: 700. Learn more about exam scores.

Part of the requirements for: Microsoft Certified: Azure Cosmos DB Developer Specialty

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What are the objectives of the Microsoft DP-420 Certification Exam?

As per the guidance of the DP-420 Dumps, there are 02 main objectives of the Microsoft DP-420 Certification Exam. The first is to understand Azure Cosmos DB architecture & components, and the second is to understand the design and implementation of cloud-native applications using Microsoft Azure Cosmos DB. Assessment of the candidate's technical knowledge and skills in the field of Azure SQL Database Administration.

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

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Languages: English, Japanese, Chinese (Simplified), Korean, German, French, Spanish, Portuguese (Brazil), Arabic (Saudi Arabia), Russian, Chinese (Traditional), Italian, Indonesian (Indonesia)

Retirement date: none

This exam measures your ability to accomplish the following technical tasks: design and implement data models; design and implement data distribution; integrate an Azure Cosmos DB solution; optimize an Azure Cosmos DB solution; and maintain an Azure Cosmos DB solution.

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Microsoft DP-420 Exam Syllabus Topics:

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

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