Aspirants preparing for the UPSC interview can benefit from embracing uncertainty by engaging in activities that enhance their adaptability. Staying updated on current affairs, reading various sources, and discussing unexpected topics with peers can build confidence. Candidates should also practice mock interviews focused on spontaneous questions to simulate the interview environment. Reflecting on past experiences, articulating opinions, and maintaining a calm demeanor will help tackle unforeseen questions effectively. Ultimately, a well-rounded understanding of diverse subjects will equip candidates to address unexpected topics with clarity and assurance.