if we get the exact cutoff mark for a particular caste,is it possible to get an admission
If you get exact cutoff marks of your category ,you will be qualified and will be eligible to get admissions but it will be hard for you to get good colleges.
For example :
Consider Cutoff for obc category is 49 marks in Jee Mains examination but you will not get any colleges under Jee if you got exact 49 marks even after you crossed the exact cutoff criteria,however there are chances that you can take admission using this marks in private colleges and some state government colleges too...
Hope this helps,Best of Luck for your future!!!
Regards,
Rajdeep Sinha

yes u can get an admission cutoff means below that mark.
Yes,you will get admission if your marks>=cutoff marks.
Yes. It is possible to get an admission. You will be ranked among all qualified students and further proceeses will start.