The different levels of competition in UPSC exams encompass three stages: the Preliminary, Mains, and Interview. The Preliminary stage is an objective-type exam that serves as a screening process, focusing on general knowledge and aptitude. The Mains examination is more subjective, emphasizing in-depth understanding and analytical skills across various subjects, while the interview assesses personality traits, communication skills, and decision-making abilities. Each phase presents unique challenges and demands distinct strategies for preparation, making it essential for aspirants to be versatile and proactive throughout their journey to succeed in this competitive landscape.