Question: What is the primary purpose of the Npcf_BDTPolicyControl_Notify service operation in a 5G System, as utilized by the Policy Control Function (PCF)?
Option 1: To request policy updates from the Network Function (NF) service consumer.
Option 2: To establish a new session for Background Data Transfer (BDT).
Option 3: To send BDT warning notifications to the NF service consumer.
Option 4: To query the status of ongoing BDT sessions.
Explanation: The correct answer is Option 3 because the Npcf_BDTPolicyControl_Notify service operation is specifically defined for the PCF to notify (in this context, send warnings) the NF service consumer about Background Data Transfer policy control aspects. This aligns with the operational procedure of sending BDT warning notifications, highlighting its role in managing and controlling background data transfers within the 5G system's policy framework.