AZ-900 Describe Azure architecture and services Practice Question

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 Container Instances

  Why it's wrong here

  Azure Container Instances (ACI) allows you to run individual containers directly without managing VMs, but it does not provide built-in orchestration, scaling, or management for multiple containers working together as a microservices application. It is best for simple, single-container tasks.

  When this WOULD be correct

  A question asking for a simple, fast way to run a single container or a small number of containers without managing VMs or orchestration, such as 'A company needs to run a single Docker container on demand with minimal configuration and no orchestration overhead.'

• ✓

  Azure Kubernetes Service (AKS)

  Why this is correct

  Azure Kubernetes Service (AKS) is a managed container orchestration platform built on the open-source Kubernetes engine. It fully manages the control plane and abstracts the underlying virtual machines, allowing you to focus on deploying, scaling, and managing containerized microservices as a cohesive cluster. AKS provides essential orchestration primitives like pod scheduling, service discovery, load balancing, and automated rollouts/rollbacks, which are critical for running a distributed microservices architecture. Its built-in integration with Azure Active Directory, monitoring, and virtual networking makes it the appropriate choice for production-grade microservices deployments.

• ✗

  Azure App Service

  Why it's wrong here

  Azure App Service is a Platform as a Service (PaaS) offering for hosting web applications, RESTful APIs, and mobile backends. While it can run containerized web apps, it is not designed to orchestrate multiple microservices as a cohesive cluster. It lacks features like service discovery and pod scheduling required for distributed container orchestration.

  When this WOULD be correct

  A company wants to deploy a single web application or API using a Docker container without managing the underlying infrastructure. They need automatic scaling and high availability but do not require multi-service orchestration. Azure App Service would be the correct choice.

• ✗

  Azure Batch

  Why it's wrong here

  Azure Batch is a job scheduling service for running large-scale parallel and high-performance computing workloads. It is not designed for managing containerized microservices and does not provide the orchestration primitives (like Kubernetes pods and services) needed for this scenario.

  When this WOULD be correct

  A company needs to run large-scale parallel batch jobs (e.g., rendering, simulations) on Azure. They want to schedule and manage compute resources automatically without managing VMs. Azure Batch would be the correct answer.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”