what to do after class 12 if I want to give CSE?

There are quite a few Entrance examinations in India to study Computer Science Engineering. Few of them are JEEMains, GUJCET, BITSAT, TS EAMCET, AP EAMCET. KCET, WBJEE, UPSEE, etc. While JEE Mains is the entrance exam that is conducted by NTA for admission to Engineering Colleges across India and BITSAT is conducted for admission to BITS Campuses, the rest of them are State Level Entrance examinations. For example, To qualify for JEE Mains, there is no minimum aggregate criteria. But if you want to join NITs, IIITs or CFTIs then you should score a minimum aggregate of 75% only in your 12th. 11th marks aren't considered. And then to appear for JEE Advanced which is the gateway for admission to IITs, you will need to fulfill the 75% aggregate condition. Now it is 75% for General Category and 65% for Reserved Categories. So how much you score in 12th is what matters to secure your eligibility for NITs, IIITs, CFTIs and JEE Advanced. But for BITSAT, there is a minimum eligibility criteria of 75% in Physics, Chemistry and Mathematics and score 60% individually in Physics, Chemistry and Mathematics as well. So it depends on the College that you want to pursue your Engineering in.