After this training you can build applications with Azure Cosmos DB that stay fast and affordable under load, and add AI features directly on top of your data. You choose partition keys for clear reasons, implement vector and hybrid search for RAG, and store conversation state and agent memory. The course suits you if you develop in C# or Python, build AI applications on Azure and want to prepare for the updated DP-420 exam.
What you’ll take away.
- Align data models and partition keys with access patterns
- Implement database operations and the change feed using the SDKs
- Configure security, availability and performance for production use
- Implement full-text, vector and hybrid search for RAG solutions
- Design stores for agent memory and conversation state
Your training in detail
- Who is it for?
- Developers and AI engineers who build scalable applications and AI solutions with Azure Cosmos DB.
- Prerequisites
- You should develop applications in C# or Python and be familiar with Azure services, generative AI concepts and retrieval-based systems.
- Format & planning
- Standard length: 4 training days. A different length can be arranged for companies.
Agenda: from understanding to application
Our independently developed agenda proposal. Focus areas, lab environment and scope are agreed before booking.
Resource model, consistency levels and Request Units
Data modelling and partitioning strategies
Queries, batch operations and the change feed
Security, multi-region operation and recovery
Analysing performance and managing accounts as a fleet
Vector and hybrid search, RAG and agent memory
Operational analytics with mirroring into Microsoft Fabric
You build the data layer for a support assistant, with a partition key, vector index, hybrid search for RAG and stored conversation state. You then review the cost in Request Units.
Exams, licences & credentials
This course prepares you for the DP-420 exam for the Microsoft Certified: Azure Cosmos DB AI Developer Associate certification. The exam and its fees are included only if your offer confirms this. The certificate comes from Microsoft. This is not an official Microsoft course.
Vendor references & review date
Sources checked on 2026-11-04. These sources describe the technology or external exam requirements. They do not imply a partnership with NextNowa.
Your learning content
These objectives describe the training topic. The specific syllabus, dates and trainer are agreed before booking; the written offer is binding.
Frequently asked questions
What has changed in DP-420?
Since 6 October 2026 the certification has been called Azure Cosmos DB AI Developer Associate. The exam now also covers AI retrieval, agent memory and analytics with Microsoft Fabric. Microsoft updates the English version first, and other languages follow about eight weeks later.
Which programming language do I need?
Microsoft expects experience with C# or Python. You should be comfortable working in at least one of them.
Does DP-420: Building AI Applications with Azure Cosmos DB include a certificate?
This course prepares you for the DP-420 exam for the Microsoft Certified: Azure Cosmos DB AI Developer Associate certification. The exam and its fees are included only if your offer confirms this. The certificate comes from Microsoft. This is not an official Microsoft course.