Applied through their job portal. Got a call after a week. They asked me about my skill set and experience in the introductory call. The interview was scheduled after a week. The first round was about my current job responsibilities and projects. Then I was asked to read some code snippets and identify the functionality of the programs. The questions that followed were case studies about software optimizations and evaluating software performances.

In the second round, they asked basic C concepts and gave a problem statement which was to be implemented in C with several constraints.

Storage classes in C, volatile qualifier in C, and data structures