3 rounds of interviews were conducted 2 being technical rounds and one HR round.all In a day.in 1st round round they test your basic knowledge about measuring instruments(Df level 3/5) etc, but they test your technical skills and professional skills in 2nd round(Df level 4.5/5).and then comes the HR round where they test your negotiation skills and the way you present yourself (Df level 3.5/5).