AZ-900: Cloud Service & Deployment Models
Cloud Service & Deployment Models is one of the skill areas tested on the Azure Fundamentals (AZ-900) exam. Below are free AZ-900 practice questions with worked answers and a concept diagram — each with a plain-language explanation. Practice the first 10 questions of AZ-900 free, no signup.
The concept, in one picture
2 free AZ-900 Cloud Service & Deployment Models questions
Your company wants to run its own virtual machines in Azure and keep full control over the guest operating system, patching, and installed software. Which cloud service model should you choose?
- ✓ Infrastructure as a Service (IaaS)
- Platform as a Service (PaaS)
- Software as a Service (SaaS)
- Function as a Service (FaaS)
IaaS gives you the raw building blocks — virtual machines, storage, and networking — while you remain responsible for the operating system and everything above it. That control over the guest OS is exactly what this scenario needs. PaaS and SaaS hand OS management to Microsoft, and FaaS runs short-lived event-driven code rather than full VMs.
Which cloud service model provides no virtual machines or infrastructure for you to deploy or manage, because the provider runs the entire stack and only exposes a finished, ready-to-use application?
- ✓ Software as a Service (SaaS)
- Infrastructure as a Service (IaaS)
- Platform as a Service (PaaS)
- Hybrid cloud
In SaaS the vendor manages everything — hardware, OS, runtime, and the application itself — and you simply use the software (for example, Microsoft 365 or Outlook on the web). There is no VM for you to deploy or configure. IaaS gives you VMs to deploy and manage, and PaaS gives you a managed platform to deploy your own code; 'hybrid cloud' is a deployment model, not a service model.
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