How strict is this college when it comes to the eligibility requirements of B.Tech. in Computer Science and Engineering at IIIT Bhubaneswar?

With an OBC category rank of seventy-one thousand five hundred in JEE Mains, securing admission in IIIT Bhubaneswar is generally very challenging. The cut-offs for IIITs, even for OBC, are usually much lower. While having a green card might offer some specific quotas or relaxed criteria for international applicants at some institutions, it's not a standard factor for JEE Mains-based admissions for Indian citizens. Your best bet would be to check the DASA (Direct Admission of Students Abroad) scheme if your green card status qualifies.

No, it's not possible because it is very exceptional to get IIIT Bhubaneswar with 83 percentile in JEE Mains because the IIIT Bhubaneswar cut-off are very high for admission. It generally requires 90 percentile but if you are from SC ST category, you may have a chance to get a seat till the last round of seat allotment. But you can try for admission in IIIT Baghalpur, Kottayam, Ranchi they have relatively lower cutoffs also there are some NITs which offers admission with lower cutoff ranks.

No, you cannot get admission IIIT Bhubaneswar because admission in IIIT Bhubaneswar is done through the JOSSA counselling and to be eligible for that you must have 75%+ marks in your class 12th ( PCM).

IIIT Bhubaneswar campus is situated in Gothapatna on the outskirts of Bhubaneswar. CCTV cameras installed everywhere on the campus. At every exit and entry point there are security staff restrict the entry of anyone who does not have an entry card or prior permission. 

IIIT Bhubaneswar desires 100% attendance. Exception can be provided to students on account of late registration, sickness, or other such contingencies. To appear in exams, 75% of attendance is needed. A student with less than 75% of attendance in a programme during a semester will be awarded a ‘W’ Grade in that programme irrespective of his/her performance in the exams/tests.