Mock interviews can significantly aid in UPSC interview preparation by simulating the actual interview environment. They help candidates practice articulating thoughts coherently and confidently in a time-restricted setting. Through feedback from mentors or peers, aspirants gain insights into their performance, addressing weaknesses in communication or content knowledge. This process not only builds confidence but also improves critical thinking skills as candidates learn to respond to unpredictable questions, thereby enhancing their adaptability on the actual interview day.