DP-420: Azure Cosmos DB Developer
Design, implement, and optimize cloud-native apps using Azure Cosmos DB
$79 practice exams are gatekeeping. Mine are $9 because it should be. Written by someone who works in cloud and AI at Microsoft NZ — for people like us.
I just passed with a 777 (Yes, Seriously). This video helped me tremendously.
@yourdream8 · YouTube
Bonus: the 28-module study guide is included free. See study guide →
Browse all exams
↓ Try the actual questions below — no sign-up needed.
Official Exam Details
| Duration | 120 minutes |
| Questions | 40–60 |
| Passing Score | 700 / 1000 |
| Exam Cost | $165 USD |
| Testing Provider | Pearson VUE |
| Validity | Renew annually (free via Microsoft Learn) |
| Question Types | Multiple choice, Multiple response, Drag-and-drop, Case study |
Domain Breakdown
| Domain | Questions |
|---|---|
| Design and Implement Data Models | 85 |
| Design and Implement Data Distribution | 25 |
| Integrate an Azure Cosmos DB Solution | 25 |
| Optimize an Azure Cosmos DB Solution | 45 |
| Maintain an Azure Cosmos DB Solution | 70 |
Free Study Guide
This cert includes a complete study guide with 28 modules — free forever.
Domain 1: Design and Implement Data Models
- Cosmos DB — The Big Picture 14 min
- Designing Your Data Model 16 min
- Partition Key Strategy 18 min
- Synthetic and Hierarchical Partition Keys 14 min
- Relationships — Embedding vs Referencing 16 min
- SDK Connectivity and Client Configuration 14 min
- SDK CRUD Operations and Transactions 18 min
- SQL Queries in Cosmos DB 16 min
- SDK Query Pagination and LINQ 14 min
- Server-Side Programming 16 min
- Transactions in Practice 12 min
Domain 2: Design and Implement Data Distribution
Domain 3: Integrate and Move Data
Domain 4: Optimize Query and Operation Performance
Domain 5: Maintain an Azure Cosmos DB Solution
- Monitoring: Metrics, Logs, and Alerts 16 min
- Backup and Restore: Periodic vs Continuous 14 min
- Network Security: Firewalls, VNets, and Private Endpoints 14 min
- Data Security: Encryption, Keys, and RBAC 16 min
- Cost Optimization: Throughput Modes and RU Strategy 16 min
- DevOps: Infrastructure as Code and Deployments 16 min
- Exam Strategy and Cross-Domain Review 14 min
Frequently Asked Questions
What is the passing score for the Azure Cosmos DB Developer exam?
The passing score for Azure Cosmos DB Developer (DP-420) is 700 / 1000. Our practice exams use an 80% threshold to help you build confidence before the real test.
How long is the Azure Cosmos DB Developer exam?
The official Azure Cosmos DB Developer exam is 120 minutes long. You can simulate this time pressure using our Exam Mode, which includes a countdown timer and auto-submit.
How much does the Azure Cosmos DB Developer exam cost?
The Azure Cosmos DB Developer certification exam costs $165 USD. You can prepare with our 250-question practice exam for just $9 (1 year access) — a fraction of the real exam fee. Plus, our complete study guide is free forever.
How many questions are on the Azure Cosmos DB Developer exam?
The official Azure Cosmos DB Developer exam has 40–60 questions. Our practice bank includes 250 exam-style questions with detailed explanations covering all 5 domains.
How long is the Azure Cosmos DB Developer certification valid?
The Azure Cosmos DB Developer certification is valid for: Renew annually (free via Microsoft Learn). Plan your recertification early and use our practice exams to stay sharp.
Is the Azure Cosmos DB Developer practice exam worth it?
Yes — our 250-question practice exam includes three study modes (Study, Exam Simulation, and Flashcards with spaced repetition), detailed explanations for every answer, adaptive question selection, and progress tracking across all 5 domains. The complete study guide is free forever. 20 practice questions are free with no account needed. Full access is $9 for 1 year.
How do I prepare for the Azure Cosmos DB Developer certification?
Start with our free study guide to build your foundation, then use Study Mode for instant feedback and concept learning. Switch to Exam Mode for timed practice under real conditions (120 minutes, 700 / 1000 to pass). Use Flashcards with spaced repetition to retain key facts long-term. Track your readiness score across all domains.
How does purchasing work?
Click "Unlock $9" above → pay securely via Stripe → receive a licence key instantly on screen (also emailed in your Stripe receipt). Enter the key on the practice page to unlock all 250 questions. No account needed. Each cert is purchased separately at $9 for 1 year of access.