Azure IoT Developer (AZ-220) study guide
Azure IoT Developer (AZ-220) · Work through your exam, one topic at a time.
AZ-220, Microsoft Azure IoT Developer, was a specialty-level Microsoft certification exam for developers who build both the cloud and device sides of an IoT solution. According to Microsoft's exam page, candidates were expected to configure and maintain devices through cloud services, set up physical devices, and troubleshoot device configuration across the lifecycle. The Azure IoT Developer (AZ-220) study guide has 7 sections and about 2,114 words.
01Set Up the Azure IoT Hub Solution Infrastructure
IoT Hub sits at the centre of the solution. Understand the tiers: Basic (device-to-cloud only) versus Standard (adds cloud-to-device, twins, device management, and modules).
356 words, about 2 min02Provision and Manage Devices
Devices authenticate to IoT Hub with SAS tokens (symmetric keys) or X.509 certificates . Understand the SAS token structure: resource URI, expiry, and signature computed with the device key.
333 words, about 2 min03Implement IoT Edge
IoT Edge has three parts: the IoT Edge runtime (edgeHub and edgeAgent), modules (your code), and the deployment manifest . Understand that edgeAgent pulls the deployment and manages modules, while edgeHub handles local routing and buffering.
290 words, about 1 min04Implement Business Integration
Business integration means moving IoT data into line-of-business systems. Know IoT Hub message routing with queries on message properties, twin properties, and body, and the endpoints: Event Hubs, Service Bus queues and topics, Blob Storage, and custom endpoints .
311 words, about 2 min05Process and Manage Data
Data processing covers ingestion, transformation, storage, and hot-path versus cold-path analysis. Know IoT Hub built-in endpoint versus custom endpoints , and how consumer groups let multiple readers share an Event Hubs-compatible endpoint without competing.
261 words, about 1 min06Monitor, Troubleshoot, and Optimize IoT Solutions
Monitoring uses Azure Monitor metrics , diagnostic logs , and IoT Hub metrics such as telemetry messages sent, twin reads, and throttling errors. Know distributed tracing for IoT Edge and the troubleshooting blade for device connectivity.
286 words, about 1 min07Implement Security
Security spans identity, transport, and data. Know per-device SAS keys , X.509 certificates , and shared access policies with least privilege.
277 words, about 1 min