UPSC Prelims 2015 Question Paper 1 & 2 Download .UPSC had conducted Civil service and Forest service (combined) preliminary exam aka CSAT-2015, on 23th August 2014. Here are the scanned copies of Booklet no.”B” for both paper 1 (GS) and Paper 2 (Aptitude): Download UPSC Prelim 2015 GS1 Paper Download UPSC Prelim 2015 GS2 Paper