Dear aspirant,

As you have mentioned that you have got 1k rank in SRMJEE(2021) then you would be absolutely eligible for the computer science branch but yes the specialisation branch is the top branch in SRM which you had choose so it is a difficult to predict what would get exactly.

The cut offs depends on various including difficulty level of the exam,the number of candidates appearing in that examination, the number of vacant seats.

If you would mention the choices that you have filled in choice filling in the comments box then I would be able to guide you more accurately.