UPSC assesses candidates' communication skills during interviews by observing their ability to articulate thoughts clearly and engage effectively with the panel. Candidates are expected to express their ideas coherently, demonstrating not only knowledge but also the ability to defend their viewpoints. The interview environment mimics real-world scenarios that civil servants may encounter, requiring candidates to answer questions thoughtfully and engage in discussion. Strong communication skills are critical for public servants as they must interact with diverse stakeholders and convey information accurately.