hello sir, I've completed my 12th with 65% do I've eligibility to join B.Tech (CSE) in your university and when is entrance exam of LPU.

Based upon your percentage you are not eligible as minimum 70% is required you need to appear for LPU-NEAT entrance test which held at various cities and multiple time across India. You need to purchase a prospectus costing Rs. 900/- fill the form and choose date as per your convenience. For detail

Sir i h've passed 12th with 52% do I've eligible for B.COM in ur university