first you will be given a written test then you must pass the group discussion and after that you will have a face to face interview. most probably their written test is full of basics form strength of materials and manufacturing process and operation research also

This stage often includes questions relevant to your field, such as engineering principles, problem-solving scenarios, or, for technical roles, questions on software and tools.Uses the STAR method (Situation, Task, Action, Result) to assess cultural fit, teamwork, and problem-solving skills. Caterpillar emphasizes values like collaboration and adaptability.