hello,

If you've entered your second year, now is the optimum time to start the preparation for the entrance exams especially if you are a little weak in maths. JNU and DSE exams are not very easy as they put your 3 years of undergraduate Concept learning to test. So it is always better to Start early. Practice alot and check out previous years papers.

You can also  check out these links

https://www.careers360.com/exams/jnuee

https://www.careers360.com/colleges/delhi-school-of-economics-university-of-delhi-delhi

Hope this helped. Good luck.