3 step process.
Step 1: HR interview at Chittagong head office. Asked about me, my family, my future plan, why I'm not going abroad for higher education, why not government job etc.
Step 2: Technical interview at Dhaka corporate office. Asked a lot of questions. Mainly about core mechanical engineering - thermodynamics, solid mechanics, fluid mechanics etc.
Step 3: Interview with Deputy Managing Director. Only 1 minute interview. They told us that interview time is at 12 pm. We were present at 11:30 am. But we had to wait for 9 hours for an one minute interview. Our interview started at 9 pm. Asked only about me, my father, my hometown and university.