Question: What is the purpose of the Nnef_ServiceParameter_Notify operation in the 5G System (5GS)?
Option 1: To request service-specific parameter provisioning from the AF.
Option 2: To notify the NEF about a change in the UE's location.
Option 3: To deliver UE policies to the AF.
Option 4: To notify a Service Parameter Authorization Update or forward a notification for a subscribed event by the AF.
Explanation: The Nnef_ServiceParameter_Notify operation is used by the NEF to notify a Service Parameter Authorization Update (e.g., to revoke an authorization) to the AF or to forward a notification for a subscribed event by the AF, such as the notification of outcome of UE Policies Delivery to AF. This operation allows the NEF to inform the AF about changes in service parameters or events related to UE policies delivery.