To be eligible for a Diploma degree at Valivalam Desikar Polytechnic College in Nagapattinam, candidates must have completed their 10th standard examinations from a recognized board with a minimum aggregate of 50%. Additionally, candidates must have studied Mathematics and Science as compulsory subjects in their 10th standard curriculum. Admission to the Diploma program is based on merit and performance in the entrance examination conducted by the college. Candidates must also meet any other specific eligibility criteria set by the college for the respective course they are applying for.