Aspirants can gauge their readiness for the UPSC interview by participating in mock interviews that simulate real interview environments. Feedback from experienced mentors or peers enables candidates to identify areas needing improvement, such as communication skills and subject knowledge. Furthermore, reviewing commonly asked interview questions can enhance preparedness. Self-assessment on aspects like body language, confidence, and clarity of thought also plays a crucial role in readiness evaluation. Ultimately, consistent practice and constructive feedback will help candidates feel more confident and equipped for the interview process.