DP-420 · Designing and Implementing Cloud-Native Applications Using Microsoft Azure Cosmos DB
Each publication has a different job. Start with the guide that matches what you need now, or use them in sequence for the most complete JITA learning experience.
Build working judgment for Azure Cosmos DB application and data architecture.
This Field Guide develops a working mental model of Azure Cosmos DB application and data architecture. You will connect choose partition keys and data models that match workload access patterns and scale, reason about consistency, throughput, request units, indexing, and query cost, use SDKs, transactions, change feed, functions, and data-movement patterns correctly, and design connectivity, security, authentication, and application access to Cosmos DB. You are not just memorizing feature names; you are learning what owns the requirement, what can fail, and how to verify the outcome.
- partition-key problem vs indexing/query problem
- consistency requirement vs throughput/performance requirement
- change feed processing vs direct application query path
Prove your DP-420 judgment across Azure Cosmos DB application and data architecture under exam-style conditions.
This Exam Preparation Guide tests whether your understanding of Azure Cosmos DB application and data architecture survives realistic decision pressure. You will practice separating partition-key problem vs indexing/query problem, consistency requirement vs throughput/performance requirement, and change feed processing vs direct application query path. Each scenario is designed to make you identify the governing fact, reject the nearest plausible alternative, and explain the evidence that keeps the correct answer correct.
- partition-key problem vs indexing/query problem
- consistency requirement vs throughput/performance requirement
- change feed processing vs direct application query path
Understand it first. Then prove you can apply it.
The Field Guide builds the understanding. Use it when you need the architecture, mechanics, dependencies, tradeoffs, failure paths, and verification logic behind the certification.
The Exam Preparation Guide tests the judgment. Use it when you need to practice under exam-style conditions, distinguish close answers, and understand why the correct answer survives changed facts.
Recommended sequence: Field Guide → Exam Preparation Guide → return to the Field Guide for targeted remediation where needed.