Critical problem-solving skills are significant for UPSC interview performance as they demonstrate an aspirant's ability to think analytically and respond effectively to complex situations. Interviewers assess candidates' capacity to dissect problems, evaluate options, and propose rational solutions. This ability reflects a candidate's readiness to handle real-world challenges in governance. Additionally, displaying composure and clear reasoning during interviews can leave a positive impression. Developing these skills involves engaging in mock interviews and practical case studies relevant to civil service scenarios.