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Microsoft DP-420 certification exam is designed for individuals who are interested in demonstrating their expertise in designing and implementing cloud-native applications using Microsoft Azure Cosmos DB. DP-420 exam validates the skills and knowledge required to design and implement scalable, globally distributed, and highly available applications using Azure Cosmos DB. DP-420 exam covers various topics such as data modeling, partitioning, indexing, querying, and scaling Azure Cosmos DB databases. Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB certification exam is suitable for developers, architects, and data professionals who work with Azure Cosmos DB and want to validate their skills and knowledge in this area.

The DP-420 certification exam covers various topics, including Azure Cosmos DB data modeling, partitioning, consistency, and throughput. Candidates will be tested on their ability to design and implement Cosmos DB solutions using various APIs and programming languages such as SQL, MongoDB, Cassandra, and Azure Table API. They will also be expected to understand how to integrate Cosmos DB with other Azure services and implement security, backup, and recovery strategies.

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Microsoft DP-420 exam consists of multiple-choice questions and performance-based labs. DP-420 exam covers a range of topics, including designing and implementing containers, designing and implementing Azure Cosmos DB databases, data access, and data storage. DP-420 exam also covers topics related to security, monitoring, and troubleshooting Azure Cosmos DB applications.

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

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