To be eligible for a Diploma degree at Government Polytechnic College, Karur, aspiring candidates must meet certain criteria. Firstly, applicants should have completed their secondary education (10th grade) from a recognized board or its equivalent. Additionally, they should have studied Science and Mathematics as compulsory subjects during their secondary education. Furthermore, candidates must have secured a minimum aggregate score of 50% in their 10th-grade examinations. It is important to note that eligibility requirements may vary for different specializations within the Diploma program. Therefore, interested individuals are advised to refer to the official college website or prospectus for specific eligibility criteria pertaining to their desired course.