Hello Ratna, 

You need to check for the following:

Score requirements in standardised exams for the college you are applying to.

Your IELTS/TOEFL scores should be up to the mark.

Your scholarship amount must be sanctioned.

You need to have good co-curriculars for interview rounds.

Also, do apply within the given dates. 

Search college, Give test, Apply, join

The undergraduate programs in USA and Canada would be provided with an admission with an exam called SAT.Decide with the country you wish to have the course done and Canada also accepts the SAT score.The test would comprise of the Math, Reading, and Writing *Essay to be an optional section. Test duration would be for 3 hours and the test can be given 5 times in an year.