Dear Souvik, here is a link for sample question paper for AISEE: https://www.aisee.co.in/aisee-sample-question.pdf

AISEE doesn't release its previous question papers officially. So what you have is coaching centres relying on the Student's memory of the questions asked in the examination. For Engineering and Medical Syllabus, please visit their official website at: https://www.aisee.co.in/