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Yes it is.
The selection process is done is 2 stages. First is the written test where the candidates are mostly asked to write an essay on a particularly prominent issue, then comes the personal interview where the faculty of your desired course will ask you some questions to test your knowledge in that particular field and will quickly analyse all your skills and talents that you may likely exhibit in your field.
The admission procedure sometimes differs on the basis of Eligibility Criteria also, like in case of http://B.Sc the Eligibility is 10+2 (min 55%) with min 55% in Physics.
The Admission procedure for each program differs down the lines of whether there will be a Written Test, Group Discussion, Interview etc that will be conducted by keeping the course in which you are interested as the base.