Effective mock interview sessions for UPSC preparation can be conducted by simulating the actual interview environment. This includes setting up a formal setting, appointing experienced mentors as interviewers, and adhering to the time limit. Candidates should prepare by reviewing common questions and formulating clear, concise responses. Feedback is crucial; interviewers should provide constructive criticism on body language, clarity, and content relevance. Additionally, including a diverse panel of interviewers can provide varied perspectives, enhancing candidate readiness for the unpredictable nature of real interview questions. Regular practice helps to build confidence and reduces anxiety.