Hello LA Lit,
Yes, there are numerous exams for the diploma student depending on the line you wanna pursue. You can opt for the recruitment exams. 
In the recruitment exam, there are so many exams conducted to join the PSUs, state and central government organizations, educational institutions, banks etc. You can fight any exam conducted by these and can work in the non-executive or technician cadre. So all the best for the exams you want to take.