AZ-900 Cheat Sheet

99.9% SLA (Premium SSD)

99.95% SLA (≥ 2 VMs)

99.99% SLA (≥ 2 VMs across ≥ 2 zones)

99.95% SLA

99.995% SLA

99.9% for reads

> 60 regions worldwide

Every region has a DR pair (≥ 300 mi apart)

≥ 3 independent datacenters per region

Fault domains + Update domains in 1 datacenter

Shares rack and power (max 3 per AS)

Updates simultaneously (max 20 per AS)

Upfront capital expense (own hardware)

Recurring operating expense (cloud)

Pay only for what you use (IaaS)

Up to 40% discount vs pay-as-you-go

Up to 72% discount

Up to 90% discount, can be evicted

Reuse Windows/SQL licenses in the cloud

Group subscriptions (up to 6 levels of hierarchy)

Compliance rules at scale (Deny, Audit, DeployIfNotExists)

Role-based access control (Owner/Contributor/Reader)

CanNotDelete or ReadOnly — prevent accidental changes

Key-value metadata for organization and cost reporting

Data governance: discover, classify and protect data across the organization

Central hub for metrics and logs

Workspace for KQL queries over logs

APM for apps (telemetry, dependencies)

Status of Azure services affecting you

Recommendations for cost, security, and performance

Manages on-prem/multi-cloud resources from Azure