Why This Cheat Sheet Matters for AZ-900
This cheat sheet covers the most important Azure Cloud Fundamentals concepts tested on the AZ-900 (Azure Fundamentals) certification exam. It contains 3 sections with 13 key points that you should memorize before exam day. Understand cloud computing models (IaaS, PaaS, SaaS), benefits of cloud services, and cloud deployment types including public, private, and hybrid. Use this as a quick-reference guide during your final review sessions.
Cloud Benefits
- High Availability: systems remain operational with minimal downtime.
- Scalability: add resources to handle increased demand (vertical or horizontal).
- Elasticity: automatically scale resources up or down based on demand.
- Agility: quickly deploy resources as business needs change.
- Geo-distribution: deploy resources in regions closest to users.
- Disaster Recovery: recover from failures using cloud backup and replication.
Service Models
- IaaS: most customer control — you manage OS, middleware, apps, data.
- PaaS: platform managed — you manage apps and data only.
- SaaS: fully managed — you only manage data and access.
- Shared responsibility shifts from customer to provider as you move from IaaS → PaaS → SaaS.
Deployment Models
- Public cloud: resources owned and operated by cloud provider, shared across tenants.
- Private cloud: dedicated infrastructure for a single organization.
- Hybrid cloud: combines public and private clouds for flexibility.
Practice Cloud Concepts Questions
Put your knowledge to the test with practice questions.
Azure Quick Reference Tips
Azure services follow consistent naming patterns that help with exam recall. Resource Manager (ARM) templates use JSON, while Bicep provides a cleaner DSL for infrastructure as code. Remember that Azure resources are organised in a hierarchy: Management Groups → Subscriptions → Resource Groups → Resources.