1. Aptitude Round: Covers logical reasoning, verbal, and quantitative questions. Typically time-limited (e.g., 30 min for ~30 questions) 2. Coding Round: Focuses on data structures and algorithms, with medium-level tasks such as HashMap manipulation or array-based logic 3. Technical Interview: Common topics include: OOP concepts Data structures (e.g., Trees, HashMaps) SQL queries and joins Cloud computing fundamentals Discussion on projects and practical experiences 4. HR Round: Assesses your communication, motivation, alignment with Ecolab’s values, and discussion of achievements and projects