Strategies to tackle negative marking in UPSC exams include deliberate preparation and understanding of exam patterns. Candidates can avoid negative marking by prioritizing accuracy over the number of questions attempted. Familiarizing oneself with the existing syllabus and key topics can enhance confidence during the exam, leading to better performance. Practicing with mock tests can help improve time management while reducing unnecessary risks of guessing answers. Another effective strategy is to eliminate clearly incorrect answers first, thereby improving the chances of selecting the correct option while minimizing negative marking issues, ultimately leading to achieving maximum scores.