Detailed Explanation: A KEDA custom scale rule must identify what scaler to use and which resource within that scaler should be observed. For Azure Storage queues, the trigger type selects the Storage Queue scaler and the queue name identifies the specific queue whose message count drives scaling. Polling interval and maximum replicas are general scaling controls, but they do not define the required queue-specific trigger. Therefore trigger type and queue name are the essential rule values tested here.

Study Guide Alignment: Containerized Azure workloads: registry builds, App Service containers, Container Apps revision/scaling behavior, and AKS deployment choices.

Official Microsoft Learn References: AI-200 Study Guide | Set scaling rules in Azure Container Apps