can be a graduate student is eligible to write BITSATt exam after his/her graduation?

Hi

No, you cannot appear for BITSAT exam after your graduation.

This is because,

Graduation is at least a 3 year long course, but for BITSAT , one is eligible for only two consecutive year starting from the year of passing 12th.

For your reference,

BITSAT 2021 examination eligibility criteria is provided below :-

=) you should be either appearing for 12th board examination 2021 or should have passed it in 2020 with PCM i. e physics chemistry and mathematics  (or PCB i. e physics ,chemistry and biology in case of students applying for B Pharma, PCM candidates are also eligible for B Pharma)

=) You should have got at least 75% marks in aggregate of physics chemistry  and mathematics ( if you have taken mathematics for your BITSAT examination)

or

at least 75% marks in aggregate of physics chemistry  and biology( if you have taken biology for your BITSAT examination)

=) you must have got at least 60% marks individually in each of physics, chemistry  Maths/ biology

=) There's no age limit to be eligible

You can check detailed information regarding eligibility at

https://engineering.careers360.com/articles/bitsat-eligibility-criteria/amp

After your graduation,

You can appear in BISAT HD examination conducted for admission in mtech or M.Pharm/M.Phil . You can check its eligibility at

https://engineering.careers360.com/articles/bits-hd-admission-test

Thank you