How many days earlier I have to apply for given position to get an interview call.
If you are talking about this job offer-
Check the bottom of the page.
Its written, Last Date: Thursday, 31 Aug, 2017
So apply by today.
All the best! 
I have scored 160 percentile in elitmus exam. I am from ECE stream but have deep knowledge in web development. What is the possibility of getting an interview call from GeekyAnt.
calls are already sent to candidates.
Really man??160%!!! ??? Tips batao kuchh.