Sir what should i do if wont get seat on josaa counselling?

Hey there!

For BSc in computer science in DU, you don't need to submit any ranks secured by you in any of the engineering exams. You need to submit your standard 12 final examination marks, in order to apply for admission there. You are advised to visit the following link to know about the previous year cut offs in DU for science: http://www.du.ac.in/du/uploads/Admissions/Cut-off/2018/Science_1.pdf

Hope this helps. All the best!