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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

Download exam skills outline

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

Microsoft DP-420 Exam Syllabus Topics:

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

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