Dear Yogendra, FDDI AIST will be a written exam conducted in English for 2 and 1/2 hours. There are 4 sections and there will be  50 questions asked in each question. Section A is Quantitative Aptitude, Section B is Verbal Activity, Section C is General Awareness and Section D is Business Aptitude Test. The syllabus involves topics from Class XI and Class XII. You have to keep yoursrlf updated with current affairs for General Awareness Section. Work on your speed to complete answering all questions, Solve previous question papers and as many sample papers as possible.