Hi Karan,

Only few colleges in DU offer hostel facilities and even they are limited in number. Among the colleges that you have mentioned, only Keshav Mahavidyalaya provides hostel facilities. They have just 80 hostel seats and they are only for girls. These are given purely on merit basis. 

There are some other hostels of DU which are not part of the college but are located in North and South Campus. You may contact them for the procedure, please check this link of the official website of DU-

http://www.du.ac.in/du/index.php?page=hostels

However, most students opt to live in PGs or rented flats. There are numerous options available and you could find a place close to your college. The popular and good PGs include those of Coho, Stanza Living etc. Cheaper options are also available in every place. 

All the best!