The whole process took around 3 weeks, including the telephonic interview. The interview process was long.

First, there was a technical telephonic interview where the candidate was asked basic C language questions related to DMA, static, volatile and their scope, memory distribution, etc., followed by basic real-time OS questions such as semaphores, mutexes, priority inversion, etc.

After the telephonic interview, I was called for an onsite interview. There were 5 rounds in total: HR and then 4 technical rounds. Be prepared, even during lunch, the interview continues. Each technical round started with basic OS and embedded C questions, followed by detailed questioning on the resume, and concluded with a coding question. The coding question was generally related to the position applied for.

Reverse a Linked List.

Reverse a sentence (words reversed instead of characters).