You are developing microservices running on Azure Container Apps with external TCP ingress enabled. The company requires scaling the services based on an Azure Event Hub trigger using a custom KEDA scaling rule. Which two KEDA trigger fields are required? (Choose two.)

When configuring a KEDA (Kubernetes Event-driven Autoscaling) scaled object, the type and metadata fields are essential for defining the scaling trigger. The type field specifies the kind of event source KEDA should monitor, such as azure-eventhub. The metadata field provides the specific configuration details for that trigger type, including connection strings, consumer groups, and other parameters necessary for KEDA to connect to and monitor the Event Hub. Without both type and metadata, KEDA cannot correctly identify or connect to the event source to scale the microservice. authenticationRef is used for referencing external authentication secrets, name is an identifier for the trigger, and metricType specifies how the metric should be interpreted (e.g., AverageValue, Value), but these are not universally required for every KEDA trigger definition.