The Rank predictor JEE MAINS-2015 ( in shiksha.com) is Genuine or not? I if not Genuine then how much percent accurate?

You can't say it genuine these are just prdictors not actual.prediction generally depand on past years jee rank which, level of difficulty of this year jee main paper and the cutoff marks which the predictor has predicted for this year jee mains.so they are not actual.

There is no actual rank calculator, that is why it is called rank PREDICTOR. What is your percentage and marks in JEE. First try to get seat in IIT's followed by NIT's and the for BIT, Lovely Professional University, VJIT. Best of luck.