The application process for the UPSC Civil Services Examination involves several steps. Aspiring candidates must first register online via the official UPSC website, filling out the application form with necessary details. Alongside personal information, aspirants must indicate their preferred examination centers and optional subjects. Payment of the application fee is mandatory, after which candidates prepare for the preliminary exam. Post-prelims, successful candidates must complete a detailed application for the mains, culminating in both written and interview stages for final selection.