The TCS interview process generally starts with an online test called the TCS National Qualifier Test (NQT), which assesses a candidate's aptitude, reasoning, verbal ability, and basic programming skills. Candidates who clear the NQT are then shortlisted for a technical interview, where they are questioned on their core technical skills, programming knowledge, and problem-solving abilities. This is followed by a managerial interview to evaluate the candidate's approach to problem-solving, teamwork, and leadership qualities. The final round is an HR interview, which focuses on assessing the candidate's communication skills, cultural fit, and overall suitability for the company. Successful candidates receive an offer letter after clearing all these stages.