Hello,
Are you talking about enforcement officer exam .
If yes then there is a total vacancy of 421.
UPSC EPFO has 2 stages - Recruitment Test and Interview.
The stage-1 will be an offline exam (Pen & Paper Based) and the next stage will be a face-to-face personality test.
For general you need to score atleast 50 marks and for OBC category 45 marks are required whereas ST/SC/PH require 40 marks.
Here are some books for your preparation :
Hope this helps!!
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile