Good luck for the Delhi School of Economics entrance exam.
Some general tips for the upcoming exam:
1) Please take proper sleep (6-7 hours) a night before the exam.
2) Eat light food to avoid stomach upsets and other health problems.
3) Make sure you read the instructions carefully given on the website/prospectus about what you need to take to the examination hall and when to reach there, and follow them.
4) While writing the exam, don't spend too much time on a problem.
-Given that the exam is 180 minutes long and is worth 100 points, simple calculation shows that each point deserves not more than 1 minute 40 seconds of your time. I understand some problems take longer than others to solve but you must try and save time by doing first those problems that take lesser time and then use your savings judiciously towards the end.