Aptitude Round: Quantitative aptitude, logical reasoning, verbal ability to filter candidates. 3 Technical Rounds: DSA Fundamentals: Arrays, strings, recursion, time/space complexity Coding Round: Live problem-solving (LeetCode medium-hard), debugging System Design/Advanced: Architecture patterns, database design, APIs, scalability HR Round: Behavioral questions, team fit, salary negotiation, notice period, background verification. Focus shifts from ML/stats to core CS fundamentals, clean code practices, and software engineering principles. Expect questions on OOP, design patterns, and production system challenges.