To join NDA candidate’s age should be ‘’16 years 6 months’’ to ‘’19 years 6 months’’ at the time of commencement of course. The candidate must belong to India and only unmarried Men are allowed in NDA. Educational qualification required is 10+2 with Physics and Mathematics. The students appearing for 10+2 can also apply.
Assuming that you are eligible to write the NDA exam (check your eligibility here), joining NDA is a four step process. 1st step is to clear the written exam which is held twice a year. 2nd step is to clear SSB (services selection board) and the third step is to clear medical examination. Once all of the above is done then a merit list is made by UPSC which is the fourth and the final step.