I applied through college or university. I got a call for a phone interview. The interview was purely technical with a focus on C programming skills. I was provided with a poorly written C program and asked to pinpoint the bugs in it. Follow-up questions were based on the bugs found in the program.

Gave me a C code before the interview and had to fix it. There was a couple of bugs and logic errors but were not too difficult to solve. Questions were related to the code and what functions do what.