The TCS interview process consists of multiple stages, starting with an Online Test that evaluates aptitude, reasoning, verbal skills, and coding abilities. Successful candidates proceed to the Technical Interview, where they are assessed on data structures, algorithms, OOPs, databases, and coding proficiency. Some roles may also require a Managerial Interview, focusing on problem-solving and decision-making skills. The final stage is the HR Interview, which evaluates communication, career goals, and cultural fit. To succeed, candidates should practice coding, revise core subjects, and prepare for common HR questions.