Hello Sarang,
The iist admission procedure will be taken through many entrance examination for the UG AND PG courses .
For the admission procedure once you check below link
https://engineering.careers360.com/articles/iist-btech-admission
Coming to the jobs opportunities ISRO will be directly recruit the candidate by cutoff GPA and also various companies like TCS,vizexperts and other MNC companies will be recruting the students .
The average salary will be around 8 lakhs per annum
All the best
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