Is graduation certificate verification mandatory ..? how can i know next ph test centre in nearest city..?

is graduation certificate verification mandatory for job selection …? how can i know next PH test center in nearest city…? city is hyderabad… are the centers fixed…?

Regarding your first question, if you are graduated and you have not received your graduation certificate till now then you can also show all semester grade cards in place of it.And if you are not graduated, then you have to show grade cards for the semesters completed till now.
Regarding your test center query, I think that you will get to know the test center only when your admit card is available to you which will mostly be 2-3 days before your exam. Since it is written exam you will mostly get some school or college in Hyderabad which you can reach easily with help of Maps.
Hoping it helps you!