is there any exam for a student to qualify for admission in the university?

I assume from the other questions posted by you that you are seeking information for the masters in law program. To answer your question, no there is no qualifying exam. Admission will be on the basis of your LLB percentage, your IELTS score, your SOP and your LOR's. Also if you have work experience

in which course you would like to take admission....if mba then many universities require a GMAT of 550 and IELTS also almost all of them require 4yr bachelors and atleast 2 yrs work exp.....could you mail me your CV to edu.overseas.singh@gmail.com so that i can give you options accordingly