Multiple rounds were conducted, with some days in between as candidates were screened for the next stage. These included:

1. Phone interview
2. Skype interview

Only technical questions were asked, which were somewhat difficult for the typical undergraduate student. These questions were posed in quick succession during the phone interview. The phone interview seemed focused on test equipment and methodologies, and other random topics. The Skype interview was more focused on circuit design.

Describe how to characterize the power efficiency of a power supply.

What is this circuit, and what are the voltage waveforms?