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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.

What are the prerequisites to take the Microsoft DP-420 Certification Exam?

There are no prerequisites for the Microsoft DP-420 Certification Exam.

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  • Go to the official website of Microsoft. Click on the “Schedule Exam”, which will take you to the Exam Registration Page.
  • Fill in the required details like name, email, and password. After that, enter the required information like your country, your exam center, and your exam date.
  • Finally, click on the “Register Now” button. You will get a confirmation mail from Microsoft with a link to take the DP-420 Certification Exam. Take the DP-420 Certification Exam at the specified date and time, with the Pearson Vue.

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

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