UPSC candidates often adopt strategies such as practice tests and mock interviews to handle unexpected questions. They focus on developing a strong conceptual understanding of topics rather than rote memorization. Familiarity with current affairs can help them think critically and respond intelligently under pressure. Time management during the examination also plays a crucial role, allowing candidates to allocate sufficient time to unexpected or challenging questions. Adapting answers on the spot and maintaining composure are key to tackling sudden curveballs effectively.