helo sumit,

Thanks for connecting to careers360 site,

you can not get admission in DU through JEE MAIN

there are selected on merit basis, and merit is arround to 94-98% for CSE branch in DU colleges.

 you can see which college's cut off you meet and seek admission accordingly. This is done through your Best of Four marks. To calculate that, you need to include Maths, one language and two other elective subjects, for Computer Science. 

hope it's helpful for you.

Thank you.