The interview process lasted for three hours, during which they inquired about all the projects I had worked on based on my profile. They were trying to extract information that was relevant to their work. I have mostly worked on the application side of development for L2/L3 routers, WiFi routers, and WLC. During the interview process, I shared my experience with them, but after three hours, they informed me that my experience was mostly in application development, whereas they required low-level coding knowledge. During the "tell me about yourself" section, I had clearly explained that I was not a low-level firmware developer

started with code in c. then the interviewer went deep down in c. how values are stored in c. what are the methods ? some algorithm to solve in c. bits bytes all the basics of c, real time operating systems, memory management. Everything related to memory management. what are the elements in rtos. there will atleast be 4 rounds in their interview process.