NDA Coaching Center in India- Delhi Career Group Well, if you take my advice regarding SSB preparation, I advise you that if you have a senior who is well-experienced and cleared the NDA exam, then you can take help from him; otherwise, I suggest you join the best NDA coaching classes in India instead of wasting time. https://delhicareergroup.quora.com/Here-are-20-Tips-that-will-help-you-Crack-SSB-in-First-Attempt