JEE

Dear aspirant hope you are doing well. It's difficult to predict because cut keep changing every year depends on various factors like no of seat available, difficulty level of exam and noo of student appear in exam. As you secured 20950 obc rank in JEE Mains. Your percentile is 94.24. No, the chance of getting IIIT Surat is less as closing rank for obc category in IIIT SURAT is 9713 for Electronics and Communication Engineering. And closing rank for obc category in IIIT SURAT is 7214 for computer Science Engineering.

With this percentile you can only get private colleges. Mostly private college have high fees
But if you want to take admission with this percentile then you have only option to go with private college. Fees will be high but on the other hand you'll also get admission there. Thanks.

Well for CCE cut off for 1st round goes around 120-125 (Rank upto 25000) you might have a chance in the final round. Nothing can be predicted as cut off marks change every year depending upon how many Candidates applying to cce at lnmit are above your rank
This college is very good comparable to many IITs and NITS. Average package of CCE is 12 Lacs per annum. So it is good deal if u are getting this. My advise go for this. Best of luck.

I am afraid you would not get the CSE seat here, but I had suggest you consider getting the IT course which closes at 90000 to 10000 cutoff and the syllabus / placement is pretty much similar to that of the CSE course. I had suggest you go through this article below, written by the HOD of our CS department.

Yes you have fairly good chances of getting a seat At your preferred college. Nothing can be exactly predicted about the branch but the chances are bit low of getting into the CSE branch. With this score of yours you can even get into the NITs or IIITs of your home state or others too but it might take almost last rounds of counseling.

It is difficult to tell you the exact about your admission possibilities but as per the previous year cutoff as OBC category the chance seems less to get a seat in walchand college of engineering sangli .
however you can try for state counseling like Punjab, Haryana, MP, Etc.
To know your other best admission possibilities of Institutes and branches in JOSSA & State counseling as per your percentile

Yes there is very much chances to get good branches in NIT on these marks.

Some colleges like IIIT Hyderabad take their own admission test you can apply for that, or else no other option is available.

Yes, you can appear for JEE also if you have taken Physics Chemistry Maths as well as Biology in 11th and 12th.