HELLO,

Yes, direct admission in Computer Science can be obtained based on 12th marks in many private colleges and deemed universities.

Some institutions offer merit based admissions without entrance exams, especially if you have scored well ( Usually 60% or above) in your 12th board exams , particularly in subjects like Physics, Chemistry and Mathematics

However top government colleges and reputed institutes usually require entrance exams like JEE Main, MHT CET , or others

You need to check the specific college's website you are interested in by visiting official website

Hope that Helps!