Hello student,

Actually it is completely depend upon your capability. If you think that you can do alone then it's ok. Otherwise you can take examinations. National testing agency conducts this examination. The examination level for PG admission is moderate. Means it is not so tough and not so easy. My advice is that you should go through the syllabus once again. You should try previous year question papers. Here are some sample papers which can help you

https://university.careers360.com/articles/jnu-sample-paper