The preliminary exam is of 400 marks but this mark is not counted for the final result. ultimately the final result is made by main and interview exam and main exam is of 2350 marks and out of these 2350 marks two papers are compulsory papers and qualifying in nature and they are of 300+300 marks. So, the total number of main exam without compulsory papers is 1750 and interview exam is around 275 marks. So, the final sum of main and interview exam is 2025.