The hiring process started with a phone call where they asked for all your details. Then, within a week, I received a call for a face-to-face interview.

The interview is completely focused on C. Until they feel you are really good in C, don't ask about other skills, like Linux, etc. Their main focus is on C.

There are many PDFs available online, such as "Crack the Interview," etc. Make sure you have prepared or recalled concepts in C.

They are very thorough; they will ask you to come for one more interview on C if they feel you are nervous and couldn't answer the questions.

The company is good. I saw people moving around with laptops and whiteboards, discussing only work while waiting for the interview to start.

Data structure implementation, such as linked lists and binary search.