When i was booking ticket from SBC it was in waiting list so i have booked from kengeri so I have booked RAC ticket from Kengeri to Hospet. I have changed boarding point SBC.How dose seat allotment happens based on boarding point or booking station.
@Vaibhav_Shetter Seat allotment happens on basis of booking station. Boarding station is just for the TTE to know which passengers are going to board train from where. By this way if there are any waiting/RAC passenger who want to travel till before your boarding, they allot your berth to those RAC/Waiting passengers. By the time you board, your berth gets vacant again and passenger travelling for short distances and are in waiting/RAC gets berth. By this way Railways takes maximum use of vacant resources.
The above answer is perpectly correct. Seat allotment will be done only from booking point, not from boarding point.