sir i live in delhi.I got cse in nit hamirpur.Can i get cse in dtu?My air rank is 8668.Also which institute shall i prefer b/w nit hamirpur and dtu?

DTU  Always best

see nitin dtu is very tough since they give only 15% of their seats to non delhites..so very few seats are there for grabs ..as far as your NITs are concerned you could easily get CIVIL/CHEMICAL/IT at MNNIT by the 5th round and after that internal sliding but wait till you atleast get biotech there by 3rd or 4th round so that you can apply for internal sliding...