I had a telephonic round, followed by an in-person interview a few days later.

The in-person interview consisted of four rounds, each lasting approximately one hour. The questions covered a good variety of topics, touching on basic C, the Linux Kernel, and Multimedia.

However, after a full day of interviews onsite, I would honestly appreciate it if the recruiter would provide feedback, even if it's negative. I sent four reminders to ask for feedback, but received no response.

Deferred probing in the Linux kernel.

Bitwise operations, for example, finding if a number is divisible by 2.