Key components of answering ethics questions in the UPSC interview include demonstrating a strong understanding of ethical principles, showing ability to apply these principles in real-life scenarios, and articulating a clear personal ethical framework. Candidates should use examples from their experiences to illustrate their decision-making processes and consider the broader social implications of ethical dilemmas. It's also essential to reflect on values like integrity, empathy, and public service, while maintaining a balanced view that considers multiple perspectives.