They first about hardware my design background (experience with PCBs and particular softwares used to design them), then with firmware, then with lab equipment. They then moved onto the technical question afterwards.
Interview questions [1]
Question 1
I was given a diagram with a signal generator generating a PWM signal feeding into a low-pass filter with some capacitor and resistance values. Then this was connected to an analog to digital converter where I was told it was not working properly. I was then asked how I would debug it.
