Hello Debasish, 

Mess charges of KIIT hostel are 15000 per semester. There is no availability of two bedded NON-AC hostel rooms. SO I would recommend you do not opt for that even they provide such information. Two bedded AC hostel are available. For Non AC you will have stay with two other roommates. 

No Hostel and mess fees are completely separate. You will have to take Rs 15000 DD during reporting day. 

Hope you find this information useful. Have a great future ahead.