Hello aspirant, firstly, symbiosis institute of technology is really good and you can go for it. Secondly expected cut off for computer science branch,  they haven't released it yet. But  I can give you the cut off last year. For you to get computer science branch, you need to score 125+ . This year probably it would have went till 135. So you need to get a percentile of 98+.

All the best

Regards

Nikhitha