If you are interested in Geography and have basic knowledge, it is not difficult to get admission at JNU. The syllabus for the entrance test is the same as that of undergraduate (Hons) in Geography. You can go through the syllabus on the website along with the question papers from the previous years too. It will help you understand how to prepare for the entrance test.
The entrance test consists of 100 marks with objective multiple-choice questions (MCQs). Do not try to attempt all questions. Rather focus on accuracy. Take a calculated risk and try to attempt 80-88% of questions correctly.
You can get an idea about the question asked in the entrance from previous year’s question papers and paper 2 and 3 of NET-JRF Geography.