BITS Pilani Hyderabad has decently constructed hostels with all basic amenities. The majority of students get single rooms while BTech first-year students get double occupancy rooms sometimes.
Adequate cleanliness is maintained and washrooms have hygienic conditions. You will find muddy water because of the recycling water system. As for the drinking water, you will get both hot and cold drinking water.
A typical room inside the BITS Pilani Hyderabad hostel comprises basic commodities such as a bed, a chair, a table, a whiteboard, a big cupboard, and storage space. Students get access to 2 charging points one near their bed and the other news to their study table in addition to one LAN port. BITS Pilani hostels are not air-conditioned but you will adapt yourself to the heat pretty soon. For reference, I am attaching a picture of my friend's room in the Ganga Bhavan hostel.