One of my relatives has resided in NIT Warangal hostels. Based on his experience, I can give the following information:
When talking about NIT Surathkal, the hostel facilities are fine. In the 1st and the 2nd year, you will have sharing rooms. From the 3rd year onwards you will get single accommodations. Internet connectivity in the hostels is not very good. The girls are provided washing machines. There is a night canteen on the hostel premises. For boys, there are no in and out timings.