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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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

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

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