Hello aspirant,
If you wish to pursue a BTech degree through direct admission then it is not possible. For getting Engineering and Medical degree, you have to compulsorily answer an entrance exam. For Btech degree, you have to answer JEE Mains paper 1 for getting into top Engineering institutes like IIT and NIT. But, if you wish to pursue the degree from a state college then you have to answer the CET exams held after 12th boards.
Good luck!
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