Hello,
UPSC exam is conducted every year. So even if you didn't get selected you can try another year. Though there are number of attempts available . Hence understand your syllabus and portion and start working towards it. All the best and thank you. Do check out the link below to know more
https://competition.careers360.com/exams/upsc-civil-services-exam
https://competition.careers360.com/articles/books-for-upsc-ias
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile