NDA

Hi Meet,
You can find all the details about the exam here:
https://www.shiksha.com/exams/nda

It is always better to go ahead with Science stream. The syllabus included for the NDA exam mainly comprises of Mathematics, Physics, and Chemistry at high proportion. This is more and enough for us to decide which stream to choose.

The previous year question paper, you can get from online sites for best coaching center.

The best way to study GK is to read newspaper.

The cutoff merit of NDA is around 450 marks.

Yes, Computer Science students are eligible for the SSB.

No, stammering candidate are not eligible for NDA, they will be out from the medical tests.

You should simply get minimum 60% in your class 12th examination, and then you should apply for National Defense Academy examination, if you cleared the written examination, then you will be called for SSB interviews, if you get recommended over there as well, then you have the medicals, and if you clear your medical, then you get your joining for NDA as an air force cadet.

Hi Brijesh,For joining Air force through NDA, you need to have Physics Chemistry Mathematics in your class 12th first, then you need to score at least 60% in it to be eligible to sit for the NDA examination. And, if you get selected in the written examination, you get your SSB call for the interview after getting recommended from there you have a medical and if you are fit for flying duties then you get the joining letter as an air force cadet in NDA.

Sorry, you cannot apply for NDA, because the age limit for NDA has maximum 19 and half years and you are 21 years, but you could definitely try for the graduate and entries such as AFCAT NCC special entry CDSE etc.