Drag a concept onto its matching description — or click a concept then click the description.
Concepts
Matches
Serverless compute service
Workflow automation service
Event routing service
Message broker service
Simple message queue service
AZ-900 Describe cloud concepts Practice Question
Match each Azure service to its primary function.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Virtual Machines: Provides IaaS virtual machines for cloud computing.
The correct matches are: Azure Virtual Machines (IaaS), Azure Functions (serverless compute), Azure Queue Storage (simple messaging), and Azure Service Bus (enterprise messaging). Common confusions include mixing up serverless with IaaS and simple messaging with enterprise brokers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Azure Virtual Machines: Provides IaaS virtual machines for cloud computing.
Why this is correct
Azure Virtual Machines offer Infrastructure as a Service (IaaS) for deploying and managing VMs in the cloud.
- ✓
Azure Functions: Serverless compute that runs code in response to events.
Why this is correct
Azure Functions is a serverless compute service that executes code triggered by events (e.g., HTTP requests, timers).
- ✓
Azure Queue Storage: Cloud messaging service for decoupling app components.
Why this is correct
Azure Queue Storage provides simple, reliable cloud messaging for asynchronous communication between app components.
- ✓
Azure Service Bus: Enterprise message broker with advanced features like topics.
Why this is correct
Azure Service Bus is a fully managed enterprise message broker supporting topics, queues, and publish/subscribe messaging.
- ✗
Azure Virtual Machines: Serverless compute that runs code in response to events.
Why it's wrong here
Incorrect — this describes Azure Functions, not Azure Virtual Machines.
- ✗
Azure Queue Storage: Enterprise message broker with advanced features like topics.
Why it's wrong here
Incorrect — this describes Azure Service Bus, not Azure Queue Storage.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
Go deeper
Related to this question
Learn chapter
IaaS, PaaS, and SaaS Explained
Key term
Serverless
Serverless is a cloud computing model where the cloud provider manages the servers, and you only pay for the actual compute time your code uses, without having to worry about provisioning or maintaining infrastructure.
Key term
IaaS
IaaS stands for Infrastructure as a Service, which means renting virtual computing resources like servers, storage, and networking from a cloud provider instead of buying and managing physical hardware yourself.
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.