Every college will focus on marks, because you as a student will focus on marks, your future employer will focus on marks, your parents will focus on marks, your peers will focus on marks.
If you want to ask which engineering colleges in India focus more on understanding rather than rote learning, the answer is easily IITs. Nowhere will you find such focus on understanding in India. It is not great by world standards, but it is certainly the best in India.
But, if you understand things, you will automatically get marks. You don't have to worry about it. Marks are meant to be an indicator of your understanding and learning, although it is imperfect.