AZ-104 ACI offers serverless container execution. 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 Kubernetes Service

  Why it's wrong here

  Azure Kubernetes Service (AKS) is overkill for running a single Linux container for only 12 hours. AKS introduces an entire Kubernetes control plane, agent node pools, networking, and upgrade cadence that require cluster administration expertise and ongoing management overhead. While AKS excels at orchestrating many containers with scaling, load balancing, and self-healing, those features are unnecessary for a one-off task; you would spend more time maintaining the cluster than actually running the container.

  When this WOULD be correct

  A question where the team needs to orchestrate multiple containers, handle scaling, and manage complex deployments over time, and is willing to manage a Kubernetes cluster (or use a managed cluster). For example: 'A team needs to deploy a microservices application with auto-scaling and rolling updates. Which service should they use?'

• ✓

  Azure Container Instances

  Why this is correct

  Azure Container Instances (ACI) is the correct choice because it provisions a Linux container directly on Azure infrastructure without requiring you to manage any underlying servers, orchestrators, or virtual machines. For a short-lived task running about 12 hours, ACI offers per-second billing, instant startup, and a simple deployment model—you just specify the container image, resource limits, and restart policy. The service abstracts all infrastructure concerns, so the development team can focus solely on the containerized application, making it the most operationally lightweight option here.

• ✗

  Azure Virtual Machines

  Why it's wrong here

  Azure Virtual Machines (VMs) would force the team to provision and maintain a full Linux operating system, including applying security patches, managing users, and handling disk and networking configuration. A VM also has higher resource consumption because the OS and hypervisor layer take up CPU and memory compared to a container that shares the host kernel. For a temporary 12-hour container workload, the administrative burden and slower startup time make a VM an inefficient and unnecessarily complex solution.

  When this WOULD be correct

  A question requiring persistent state, custom OS configurations, or legacy applications that must run on a full OS, with no requirement for serverless or container-only deployment. For example: 'A company needs to run a legacy Windows application that requires full OS access and cannot be containerized.'

• ✗

  Azure App Service

  Why it's wrong here

  Azure App Service is a platform-as-a-service designed specifically for hosting web applications, APIs, and mobile backends, not for running arbitrary standalone containers like a batch job or utility process. While App Service does support Linux containers in the Web App for Containers feature, it expects a web server listening on port 80 or 443 and naturally aligns with long-running, request-driven applications. Deploying a general-purpose Linux container to App Service would require adapting it to the web app lifecycle, which conflicts with the simple, ephemeral container runtime the team needs.

  When this WOULD be correct

  If the question required hosting a long-running web application with built-in scaling, load balancing, and CI/CD support, and the team was willing to manage an App Service Plan (which abstracts VMs but still requires configuration), Azure App Service would be the correct choice.

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-104 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

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