They test your knowledge about c-basics and Embedded system basics. you have to know well about most of c tricks and also must have knowledge about how peripherals work .
I applied through a recruiter. The process took 1 day. I interviewed at El-Araby (Cairo, Cairo Governorate) in Jun 2022
Interview
Technical Interview: They test your knowledge about microcontroller peripherlas, Embedded Systems basics , Communication protocols and thier different modes, RTOS and C basics (you have to know all c tricks )
HR Interview