Preparing for the AZ-900 Microsoft Azure Fundamentals exam doesn’t require memorizing every Azure service—it requires clarity on core concepts. This quick revision cheat sheet is designed for last-minute review, helping you recall key Azure fundamentals, exam patterns, and high-value topics before test day.
Whether you are revising the night before the exam or refreshing concepts after practice tests, this guide gives you fast, structured, exam-aligned insights.
👉 Download the AZ-900 Quick Revision Cheat Sheet PDF at the end of this page.
What This AZ-900 Quick Revision Cheat Sheet Covers
This guide summarizes the most important topics from the official AZ-900 syllabus. It focuses on cloud computing fundamentals, Azure core architecture, compute, networking, storage, identity, security, pricing, and governance. Each section is written to provide fast clarity without unnecessary technical depth.
Cloud Computing Fundamentals
Cloud computing refers to the delivery of computing services such as servers, storage, databases, networking, and software over the internet. Instead of investing in physical infrastructure, organizations consume resources on demand and pay only for what they use. This approach reduces upfront costs, improves scalability, and allows businesses to respond quickly to changing requirements.
In traditional on-premises environments, companies must purchase hardware, manage data centers, and handle maintenance. These expenses fall under capital expenditure (CapEx). In contrast, cloud services follow an operational expenditure (OpEx) model, where costs are based on actual usage.
Cloud Service Models Explained
Azure offers three primary cloud service models, each providing a different level of control and responsibility.
Software as a Service (SaaS) delivers fully managed applications that users can access through a web browser. The cloud provider manages everything from infrastructure to application updates, allowing users to focus solely on using the software.
Platform as a Service (PaaS) provides an environment for developers to build, test, and deploy applications without managing servers or operating systems. Azure handles the underlying infrastructure, enabling faster development and simplified deployment.
Infrastructure as a Service (IaaS) offers virtualized computing resources such as virtual machines, storage, and networking. While Azure manages the physical infrastructure, users are responsible for the operating system and applications, making this model suitable for scenarios requiring greater control.
Cloud Deployment Models
Cloud deployment models describe where cloud resources are hosted and how they are accessed.
In a public cloud, resources are owned and operated by the cloud provider and shared among multiple customers. A private cloud, on the other hand, is dedicated to a single organization and offers greater control and customization. A hybrid cloud combines both public and private environments, allowing organizations to keep sensitive workloads private while leveraging the scalability of the public cloud. Hybrid cloud scenarios are commonly tested in the AZ-900 exam.
Azure Core Architecture
Microsoft Azure is organized into geographic regions, each containing one or more data centers. When you deploy a resource, you choose the region where it will be hosted. Availability Zones within a region provide high availability by distributing resources across physically separate data centers with independent power, cooling, and networking.
Azure also uses region pairs, which consist of two regions within the same geography. Region pairs support disaster recovery by enabling data replication and failover in case of large-scale outages.
Azure Compute Services Overview
Azure provides multiple compute options depending on application requirements. Azure Virtual Machines offer full control over the operating system and are commonly used when customization is required. Azure App Service is a managed platform for hosting web applications and APIs without worrying about infrastructure. Azure Functions provide a serverless, event-driven computing model that automatically scales based on demand.
Azure Networking Basics
Networking in Azure revolves around the Virtual Network (VNet), which acts as a private network in the cloud. VNets allow resources to securely communicate with each other and with on-premises environments. Subnets divide a VNet into smaller segments, improving organization and security.
For hybrid connectivity, Azure supports VPN Gateway for encrypted connections over the internet and ExpressRoute for private, high-speed connections to Azure.
Azure Storage Fundamentals
Azure Storage is designed to be highly durable and available. Blob Storage is commonly used for unstructured data such as images and backups, while File Storage supports shared file systems. Queue Storage enables asynchronous messaging between components, and Table Storage provides a scalable NoSQL data store.
To protect data, Azure automatically creates multiple copies using different redundancy options. These include local replication within a data center, replication across availability zones, and geo-replication to a secondary region with optional read access.
Identity, Security, and Governance
Microsoft Entra ID is Azure’s cloud-based identity and access management service. It enables secure access to Azure resources through features such as single sign-on and multi-factor authentication.
Azure follows a Zero Trust security model, which assumes no request is trusted by default. Access is granted based on identity verification, least privilege principles, and continuous monitoring. Role-Based Access Control (RBAC) is used to assign permissions at various scopes, including subscriptions, resource groups, and individual resources.
Azure Pricing and Cost Management
Azure uses a pay-as-you-go pricing model, allowing organizations to pay only for the services they consume. Tools such as the Azure Pricing Calculator help estimate costs before deployment, while Azure Budgets and cost management features help track and control spending. For long-term workloads, Azure Reservations can significantly reduce costs.
AZ-900 Exam Revision Tips
The AZ-900 exam focuses on understanding concepts rather than performing technical configurations. Questions often present scenarios that test your ability to choose the right Azure service for a given requirement. Understanding service purposes, pricing models, and governance principles is more important than memorizing commands.
Download the AZ-900 Quick Revision Cheat Sheet PDF
This guide is also available as a downloadable PDF, making it easy to revise offline or print for quick reference before the exam.
👉 Download AZ-900 Microsoft Azure Fundamentals – Quick Revision Cheat Sheet PDF
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