No , you need to select the college while filling the DU form.After the cutoffs release , you can take admission in any of the colleges whose cutoffs you meet .But this is not the  case for the course.You have to choose your course while filling the DU form .And you have to  take admission in any of those courses only. But you can choose as many courses you want during the time of admission

To know more about du application  process ,do follow the given link :

https://university.careers360.com/articles/du-admission

Feel free to ask in case of any further queries!