AZ-900 Describe Azure architecture and services Practice Question
This AZ-900 practice question tests your understanding of describe azure architecture and services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company wants to run a containerized application in Azure without managing any virtual machines. They need automatic scaling, load balancing, and service discovery. Which Azure compute service should they choose?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Azure Kubernetes Service (AKS)
Azure Kubernetes Service (AKS) is the correct choice because it provides a fully managed Kubernetes orchestration platform that abstracts away the underlying virtual machines. AKS handles automatic scaling via the Horizontal Pod Autoscaler (HPA) and cluster autoscaler, built-in load balancing through Azure Load Balancer integration, and service discovery using Kubernetes DNS (CoreDNS). This meets the requirement of running containerized applications without managing VMs.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 Kubernetes Service (AKS)
Why this is correct
AKS provides managed Kubernetes with built-in scaling and service discovery.
Related concept
Read the scenario before looking for a memorised answer.
✗
Azure Container Instances
Why it's wrong here
ACI runs single containers but lacks orchestration features like automatic scaling and service discovery.
✗
Azure App Service
Why it's wrong here
App Service is for web apps and APIs, not designed for container orchestration.
✗
Azure Virtual Machines
Why it's wrong here
VMs require management of the OS and container runtime, contrary to 'without managing any VMs'.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Azure Container Instances (ACI) with AKS because both run containers without VMs, but ACI lacks orchestration features like automatic scaling and service discovery, making AKS the correct choice for this requirement.
Detailed technical explanation
How to think about this question
Under the hood, AKS deploys a managed control plane (including kube-apiserver, etcd, and controller-manager) while the worker nodes are also managed but still appear as VMs in your subscription—however, Azure handles node patching, upgrades, and scaling. For service discovery, Kubernetes uses DNS records (e.g., <service-name>.<namespace>.svc.cluster.local) resolved by CoreDNS, and load balancing is achieved via Services of type LoadBalancer, which automatically provisions an Azure Load Balancer with a public IP. A real-world scenario: a microservices application with fluctuating traffic benefits from AKS's cluster autoscaler, which adds or removes nodes based on pod resource requests, ensuring cost efficiency without manual intervention.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe Azure architecture and services — This question tests Describe Azure architecture and services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Azure Kubernetes Service (AKS) — Azure Kubernetes Service (AKS) is the correct choice because it provides a fully managed Kubernetes orchestration platform that abstracts away the underlying virtual machines. AKS handles automatic scaling via the Horizontal Pod Autoscaler (HPA) and cluster autoscaler, built-in load balancing through Azure Load Balancer integration, and service discovery using Kubernetes DNS (CoreDNS). This meets the requirement of running containerized applications without managing VMs.
What should I do if I get this AZ-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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