Hey,

For admissions in SSN College of engineering, the eligibility criteria is that the candidate must have completed 10+2 from a recognised board with minimum relevant score. There is nothing mentioned about the 10th score. So, admission will be based on the 12th score only. It's just that you must have passed your 10th examination as well.

For admissions, the merit score will matter. You don't have to give any entrance exam.

Hope this helps!