The TCS interview process typically involves several stages: an initial online application followed by an aptitude test assessing quantitative, logical, and verbal skills. Successful candidates then face a technical interview, which evaluates their knowledge of programming and related fields. This is followed by an HR interview focusing on fit with the company culture and personal career goals. In some cases, there may be a managerial or panel interview to assess problem-solving and leadership skills. If selected, candidates receive an offer letter and proceed through onboarding, which includes document verification and orientation. Preparing for these stages involves reviewing relevant technical concepts, practicing aptitude tests, and understanding TCS's values and services.