hello,

After completing your undergraduation if you want to go for higher education in your field from any of the foriegn countries then you have to give GRE EXAM. GRE is Graduate Record Examination. After giving gre exam you need to apply different universities/institutions globally of your choice according to your gre score card and if you got selected then all the procedures you will have to do accordingly. Also you have to appear in language test like IELETS or TOEFL. Score cards of both of these equally important.

Nothing will affect your future studies because the only crieteria is you have completed your bachlor degree.

hope this will help you

al the best!!!