Azure's managed Kubernetes service. Microsoft manages the control plane (master nodes), while the customer manages the worker nodes. It simplifies deploying, scaling, and operating containers.
Covered in AZ-104 within the context of containers and orchestration, and as an example of a container service in AZ-900. Difference from ACI (Azure Container Instances): AKS orchestrates multiple containers, while ACI runs individual containers quickly.
Azure Kubernetes Service (AKS) is a concept that can show up on the exam. Check the full guide to see it in context.