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  • DP-420 (Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB)
Exam Code: DP-420
Exam Name: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
Certification Provider: Microsoft
Corresponding Certification: Azure Cosmos DB Developer Specialty

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DP-420

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Updated: Sep 04, 2026

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The Microsoft DP-420 exam measures the candidate's proficiency in various areas such as designing and implementing Cosmos DB solutions, designing and implementing global distribution solutions, designing and implementing non-relational data modeling, designing and implementing server-side programming models, and designing and implementing security solutions. DP-420 exam requires the candidate to demonstrate their expertise in using various tools and technologies such as Azure Cosmos DB, Azure Functions, Azure Event Grid, Azure Stream Analytics, and Azure Search. Passing DP-420 exam validates the candidate's ability to design and implement cloud-native applications on Microsoft Azure using Cosmos DB and prepares them for a successful career in cloud-native application development.

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

To prepare for the DP-420 certification exam, candidates should have a solid understanding of Azure Cosmos DB fundamentals, including its architecture, data model, and various APIs. They should also have experience in designing and implementing cloud-native solutions using Azure services, such as Azure Functions, Azure App Service, and Azure Event Grid. In addition, candidates should be familiar with programming languages such as C#, Java, Python, and JavaScript, as well as web development frameworks such as ASP.NET and Node.js. By passing the DP-420 exam, professionals can demonstrate their expertise in using Azure Cosmos DB to design and build cloud-native applications that are scalable, performant, and highly available.

Microsoft DP-420 Exam Overview:

Certification Vendor:Microsoft
Exam Name:Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
Exam Number:DP-420
Exam Format:Lab, Hot area, Drag and drop, Case study, Multiple choice
Certificate Validity Period:1 year
Exam Price:$165 USD
Available Languages:Chinese (Simplified), Korean, Japanese, English
Related Certifications:Microsoft Certified: Azure Cosmos DB Developer Specialty
Exam Duration:100-120
Passing Score:700/1000
Real Exam Qty:40-60
Sample Questions:Microsoft DP-420 Sample Questions
Exam Way:Online proctored exam or in-person test center
Pre Condition:No formal prerequisite exams are required. Candidates should have experience developing Azure solutions and working with Azure Cosmos DB.
Official Syllabus URL:https://learn.microsoft.com/en-us/credentials/certifications/exams/dp-420/

Microsoft DP-420 Exam Syllabus Topics:

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

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