Dear S.MANNAT

You need to write GRE,TOEFL etc.. Entrance to qualify for the universities of foreign education after that you need apply for admission into which university you want to apply for. They will send you the I20 then you need to pay the fees for USA there is Interview in Embassy will happen but for other countries like Australia, Newzealand etc you have to drop it. Then they will send the Visa..

Hope you find the information useful.