🥽 AZ-305: Azure Messaging Services — Deep Dive
Study Notes & Exam Prep — 2026 Edition
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- 🎯 Purpose: Deep-dive study notes covering the four core Azure Messaging services tested in the AZ-305: Designing Microsoft Azure Infrastructure Solutions exam.
- 📅 Version: 2026
- ✍️ Author: Marco Grimaldi
- 🌐 Published: 🥽 AZ-305: Azure Messaging Services — Deep Dive
- 🔗 Companion repos: 📘 AZ-305 Study Notes · 🥽 AZ-305: Azure Compute Services — Deep Dive · 🥽 AZ-305: Data & Analytics Services — Deep Dive · 🥽 AZ-305: Migration, HA & BCDR — Deep Dive · 📘 AZ-104 Study Notes
🗺️ What’s in This Repository?
This companion repository to the AZ-305 Study Notes zooms into Azure Messaging — one of the most comparison-heavy topic clusters on the exam — with the depth needed to answer “which service and why?” questions confidently.
| File | Coverage |
|---|---|
| 📨 01 — Azure Service Bus | Queues, Topics, Sessions, Dead-lettering, SKUs, SLAs |
| 📦 02 — Azure Storage Queues | AT-LEAST-ONCE, visibility timeout, limits, integration |
| 🏁 03 — Azure Event Grid | Event routing, topics, domains, filters, delivery |
| 🟩 04 — Azure Event Hubs | Partitions, consumer groups, Capture, Kafka, SKUs |
| 📊 05 — Feature Comparison | Side-by-side tables: delivery, ordering, replay, limits |
| 🎯 06 — Exam Caveats & Cheatsheet | Decision trees, exam traps, quick-fire facts |
🔑 Why Messaging Matters for AZ-305
Messaging patterns surface across various exam domains:
- Data Storage: choosing Storage Queues vs Service Bus for decoupling
- Infrastructure Solutions: event-driven architecture with Event Grid; high-throughput ingestion with Event Hubs
- Business Continuity: geo-disaster recovery for Service Bus Premium; Event Hubs Geo-DR
- Well-Architected Framework: reliability through async messaging; cost optimisation via tier selection
⚠️ The exam frequently presents scenario-based questions where multiple services could work — knowing the precise differentiators (message size limits, ordering guarantees, replay capability, dead-letter support) is what separates a correct answer from a plausible distractor.
⚡ Quick Navigation
| I need to know… | Go to |
|---|---|
| When to use Service Bus vs Storage Queues | 05 — Feature Comparison § Queues |
| When to use Event Grid vs Event Hubs | 05 — Feature Comparison § Events |
| All four services side by side | 05 — Feature Comparison |
| Last-minute exam traps & decision tree | 06 — Exam Caveats |
| Service Bus SKU differences | 01 — Service Bus § SKUs |
| Event Hubs throughput units & partitions | 04 — Event Hubs § Capacity |
©️ Credits & Acknowledgements
The Just the Docs theme is used for a clean, documentation-style layout. Licensed under MIT.
Created with the help of AI. Model used: Claude Sonnet 4.6. The content has been reviewed and edited by the author for accuracy and clarity, but may contain errors. Always verify against the latest Microsoft documentation.
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