Quest Global Sr. Engineer interview questions

Interview is on Mechanical Engineering background and Also on Aero Engines, How concession will be raised by supplier and how to check the concession and also how to check in SAP and how to follow up with the designer

It was in 4 round, telephonic, face to face, customer round and HR round. Telephonic was for few mins asking why do want to join, where do you want to see yourself in 5 years etc. Face to face was more on Technical side. Customer round was longest one with Customer and was asking Technical and behavioural question. HR round was took 1 week to negotiate salary.