DP-420 January 2025 20 min read

Azure DP-420 Cosmos DB Developer Guide 2026

Reviewed by certified IT professionals • About our team

Master Azure Cosmos DB development including data modeling, partitioning, and global distribution. Complete specialty certification guide.

Azure DP-420 Cosmos DB Developer Guide 2026 - study guide and exam preparation tips

Table of Contents

What is DP-420?

The DP-420: Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB certification validates your expertise in developing solutions with Azure Cosmos DB. This specialty certification covers data modeling, query optimization, and global distribution.

Quick Facts

  • Exam Code: DP-420
  • Duration: 120 minutes
  • Questions: 40-60 questions
  • Passing Score: 700/1000
  • Cost: $165 USD
  • Prerequisites: Development experience with Azure

Exam Domains & Weightings

35-40%Design and implement data models
25-30%Design and implement data distribution
20-25%Integrate and optimize solutions
10-15%Maintain solutions

Key Topics to Master

1. Data Modeling

  • Document modeling strategies
  • Partition key selection
  • Denormalization patterns
  • Reference vs embedding data

2. Data Distribution

  • Global distribution configuration
  • Consistency levels (5 levels)
  • Multi-region writes
  • Conflict resolution policies

3. Query Optimization

  • SQL API query patterns
  • Indexing policies
  • Request Unit (RU) optimization
  • Change feed implementation

4. Integration

  • Azure Functions triggers
  • SDK usage (C#, Java, Python)
  • Bulk operations
  • Transactional batch operations

Ready to Pass DP-420?

Practice with 400+ Cosmos DB exam questions.

Start Free Practice Test

100% Money-Back Guarantee if you don't pass

Plan Your Study Journey

Use our free tools to optimize your preparation