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Training and Exam prep | specialty certification for developers building applications on Azure Cosmos DB.
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Microsoft Azure Cosmos DB Developer Specialty (DP-420) is Microsoft's specialty certification for developers who build applications on Azure Cosmos DB, Microsoft's globally-distributed, multi-model NoSQL database. It proves you can design and implement data models and data distribution (partitioning, throughput and consistency), integrate Cosmos DB into applications using the SDKs and the change feed, optimise queries, indexing and cost/performance, and maintain a Cosmos DB solution. The exam has about 40 to 60 questions and can include case studies. It is graded on a scaled score: you need 700 on a scale of 1 to 1000 to pass. Because scoring is weighted, 700 does not mean 70% of questions correct. The exam costs about US$165 (varies by region) and is delivered through Pearson VUE. There is no formal prerequisite, but Microsoft recommends software-development experience, including with the Azure Cosmos DB SDKs and a language such as C# or Java.
Azure Cosmos DB powers large-scale, globally-distributed applications, and developers who can build on it well are in demand. DP-420 is a focused, differentiated credential that proves deep Cosmos DB development skill - data modelling, the SDKs, partitioning and performance/cost optimisation. As a specialty it signals depth to employers, and Microsoft's free annual renewal keeps it current at no ongoing cost.
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DP-420 has no formal prerequisite, but it is a developer, code-heavy Specialty certification. It is ideal for: - Developers building applications on Azure Cosmos DB - .NET or Java developers moving to NoSQL on Azure - Software engineers on teams standardising on Cosmos DB - Cloud developers who want a differentiated specialty Microsoft recommends software-development experience, including with the Cosmos DB SDKs and a language such as C# or Java. This is not a beginner or administrator course.
How to earn it:
1. Prepare with a DP-420 exam-prep course (self-paced, with coding labs) - that is what we provide.
2. Register through Microsoft Learn and schedule the exam through Pearson VUE - online with remote proctoring, or at a test centre.
3. Pass the exam: about 40-60...
The Microsoft Azure Cosmos DB Developer Specialty (DP-420) certification validates your ability to develop and manage applications that work with Azure Cosmos DB. The exam assesses your knowledge of data modeling, partitioning, indexing, querying, application development, performance optimization, security, and the implementation of efficient Cosmos DB solutions. Understanding the exam structure and certification requirements can help you plan your preparation effectively and build confidence before the assessment. This section explains the exam pattern, question format, duration, certification requirements, and other important details you should know before taking the Microsoft Azure Cosmos DB Developer Specialty (DP-420) exam.
Exam details verified on 12 August 2026. Microsoft uses a scaled score (700/1000 to pass), which is not the same as 70% correct. DP-420 is a role-based Specialty certification: valid for one year and renewed free through a short online assessment on Microsoft Learn (not lifetime like the Fundamentals). You register through Microsoft Learn; the exam is delivered through Pearson VUE. Confirm current details at learn.microsoft.com (search "DP-420").
DP-420 is ideal for: - Developers building applications on Azure Cosmos DB - .NET or Java developers moving to NoSQL on Azure - Software engineers on teams standardising on Cosmos DB
