Hi Rituraj,

To prepare for NDA exam first of all you have to go through the exam patterns & syllabus for getting a knowledge about the exam properly.

So, the pattern was simple, the nda exam consists of two phases 1st- written phase &

2nd- ssb interview phase.

# for written phase, there is a single paper divided into 2 sections as:-

•Section1- Mathematics( total of 120 questions&total of 300 marks)

each correct answer is given 2.5 marks,while there is deduction of 0.83 marks for every wrong answer.

•Section2- General ability( total of 150 questions&total of 600 marks)

there is 4 mark given for every correct answer, while there is deduction of 1.33 marks for every incorrect answer.

■ Syllabus for the exam:-

#for maths- arithmetic; mensuration; algebra; geometry; statistics; probability; etc.

#for general ability- current affairs; history; general science; physics; chemistry; english reading ability; comprehensive; grammar; etc.

So, total written paper is of 900 marks & interview is of 900 marks= 1800 marks.

#books for help that you can considered are:-

1.RS Agarwal for maths

2.Suchchinda nand jha & expert competitions  for english

3.Disha experts & pratiyogita darpan for g.k.

4.NCERT books from 6th to 12th for each subjects;etc

These are some basic books that i will prefer but there are more writters for which you can go through.

Thus, by following these steps i think you can get alot of help & prepare wisely.

I will also suggest you to go for some online test series as well.

Good luck.