Which Azure Services Automatically Scale a Container?
You have an Azure subscription. You plan to deploy a container. You need to recommend which Azure services can scale the container automatically. What should you recommend?
Community Votes
100% of anonymous learners picked answer C. Votes are pick records left by other test-takers — they are not the verified answer.
Community Insight
Tests which Azure compute services provide native autoscaling for containers, with the trap of assuming Azure Container Instances can scale automatically like Container Apps or App Service.
Azure container autoscaling is natively supported by Azure Container Apps and Azure App Service, while Azure Container Instances lacks built-in horizontal scaling. This page establishes why option C is the correct recommendation when you need to deploy a container that scales automatically.
The most common mistake is choosing Azure Container Instances in options B, D, or E because ACI runs containers quickly, but ACI lacks native autoscaling and must be orchestrated or scaled externally.
Community Discussion (3 comments)
Comments & Corrections
No comments yet — spotted an error or have a note? Share it below.
Expert Analysis
Why the Answer Is Correct
Azure Container Apps is designed for container workloads and includes KEDA-based horizontal autoscaling, where you define scale rules based on HTTP traffic, events, CPU, or memory. Azure App Service can also host containerized web apps, and its autoscale feature can scale the underlying App Service plan out or in automatically. Therefore the set of Azure services that can scale the container automatically is Azure Container Apps and Azure App Service, which is exactly option C. Azure Container Instances, despite running containers, does not provide native autoscaling for a container group.Why the Other Options Are Wrong
Option A is incomplete because it excludes Azure App Service, which also supports autoscaling for containerized web apps. Options B and D include Azure Container Instances, and ACI has no built-in autoscale; any service list containing only ACI or combining ACI with one valid service is wrong. Option E over-includes ACI alongside both valid services, so it incorrectly treats Container Instances as an autoscaling platform. The only answer that names both valid services without adding ACI is C.Community Comment Notes
Community commenters converge on option C. Paula noted that Container Apps supports automatic horizontal scaling through "declarative scaling rules" and that App Service supports auto scaling for web apps including containers. FatFatSam succinctly stated "Azure Container Instance do not support auto scaling." ElectricPants also agreed with C, so the learner consensus matches the official capability split.Official Reference
Exam Strategy
When asked which Azure services scale containers automatically, separate native autoscaling from manual or external scaling. Container Apps and App Service both include built-in scale rules; ACI is a single container group with no autoscale, so eliminate any answer that includes it.
Frequently Asked Questions
Why is Azure Container Instances not recommended for automatic container scaling?
ACI runs containers quickly but has no native autoscaling; scaling requires external orchestration or scripts, so it is not a valid recommendation here.
Does Azure App Service support autoscaling when it hosts a container?
Yes. App Service autoscale rules apply to App Service plans, including plans hosting containerized web apps, making it a valid answer alongside Container Apps.
Related Analysis
Practice All AZ-104 Questions
Access 100 questions with complete answers and detailed explanations.
View Full AZ-104 Practice Test →