I don’t know when did Rajesh Valluri passed out from NITW but I can confirm the fact that there is a separate hostel for DASA(Direct Admission to Students Abroad) students.
However in the first year you are given the same hostel as other students even though you are paying more fees but international students are given single rooms as opposed to double rooms provided to other students.
From second year onward DASA students are shifted to International hall which has only single room facility with attached bathroom and balcony for each room.
Here is the attached picture for the international hostel.
Utkarsh Rastogi, Bachelors Electronics and Communication Enginnering, National Institute of Technology, Warangal (2017)