Technical interviewers were easy going, they would give you hints or lead you if you have no clue. Asked about hardware test related questions, include what to test, how to test, what could be reasons if result is not as expected. Require basic knowledge about circuit schematic diagram, wireless communication transceiver diagram, noise figure, link budget calculation, sensitivity, testing equipment (e.g. VNA, Spectrum analyzer, etc.), basic C++ or C#

Race conditions occur.