Heyy Abhay,

If you are taking the admission in undergraduate courses then you don't need to give the entrance exam, your admission will be done on the merit basis only for this year.

And if you are taking postgraduate courses then you need to give the DUET entrance exam and for B.tech course you also need to give the DUET entrance exam then only you will be eligible to take admission in DU.

Good Luck :)