Microsoft Azure Fundamentals Study Guide

You're in the right place. This is the written companion to the AZ-900 practice exams, a complete walk through everything Microsoft Azure Fundamentals covers, gathered in one place so you can read the ideas, see how they connect, and recognize them when a question puts them in front of you.

AZ-900 is a fundamentals exam, and that shapes how you should study for it. It rewards recognizing a concept and matching the right Azure service to a stated need, not configuring anything by hand. The questions cluster into three areas: cloud concepts (IaaS versus PaaS versus SaaS, the shared responsibility model, CapEx versus OpEx, high availability versus scalability), core Azure architecture and services (regions, availability zones, resource groups, subscriptions and management groups, the compute, networking, and storage choices, plus identity), and management and governance (cost tools, Azure Policy, RBAC, resource locks, and monitoring). Most of it comes down to clean decisions: do you patch the OS yourself or let Microsoft do it (IaaS versus PaaS), and do you survive a datacenter outage with availability zones or a whole-region loss with a region pair.

The guide follows the official domains and weights them the way the real exam does, so your time lands where the marks are. Each chapter builds the mental model in plain language, separates the look-alike options that the exam loves to pit against each other using comparison tables and decision trees, and finishes with a cheat sheet you can review on exam morning. Start at the top and read straight through, or pick a domain from the list beside this page and go where you need the work.