Mock interviews are valuable in final preparations for the UPSC interview, simulating the real experience so candidates can practice answering questions under pressure. They allow aspirants to refine their communication skills, body language, and ability to articulate thoughts coherently. Receiving constructive feedback from peers or mentors helps identify areas for improvement, boosting confidence and reducing anxiety. Moreover, mock interviews can simulate diverse questioning styles, preparing candidates for unpredictability during the actual interview. This practice is vital for making a positive impression on the interview panel.