Actually ISSB is More Psychological test thest then knowledge testing.I have my own expamle. After my FSc, i went for ISSB at Kohat for PMA 112.I prepared thoroughly , my father also from army helped me to go through obstacles, i crammed General knowledge, but after interview i was declared No recommended.I joined UET for Mechanical Engineering, finished last year, strated job cum css preparation, in the meanwhile, i applied for PAF , went through series of tests, including ISSB, but literally prepared not for single day as was not interested, i was selected for 102 Non GDP. I did not join Risalupur but one thing strengthened my believe, CONTINUE HARD WORK , YOU WILL REACH WHERE U HAVE BEEN DESTINED TO, DO NOT CARE OF FAILURES AND DO NOT OVER CONSIDER WINNING.