How would you explain about Informatica Project ?

Can any one please tell me how to explain Data warehouse project in interview and from where to start and end. what to explain completely in it(data warehouse project), how much hast to explain from it(dw project) and what is architecture of it and data flow and construction of dw project or data warehouse.what is data warehouse methodology ,types of dw methodology, most using dw methodology in companies right now and project plan of dw, types of Project plan.SRS of DW. High level documents and low level documents details also. what is end to end project.is it necessary using of UNIX in data warehouse or not.sample documents of dw methodology,project plan,HLL and LLD documents.