Hello Dear,

There are three stages of selection process

1. Physical efficiency test
2. Written Exam
3. Interview

For written exams Sparda vijeta magazine is the biggest source to crack psi exam.almost 60% questions come from here only .you can read upto 6 month magazines before your exam. Try to solve 10 mental ability questions daily. Also give time to your body fitness as it much needed in physical test Atleast three to four revisions just before one month of the exam is necessary and do attempt all the available practice tests .