Applied online and received a phone interview ten days later. It lasted for an hour and asked basic questions covering data structures, operating systems, C, Python, and testing. It went well.

Received a second phone interview from HR a week later. They asked about my visa status, expected pay, and when I was available to work, etc. They also asked some simple behavioral questions. This interview lasted for 20 minutes.

Then, one day later, the third phone interview came. It was a mixture of behavioral and technical questions. The questions were harder than the first round. I didn't know there was another round of interviews, so I didn't get prepared.

One week later, HR told me that they went with another candidate.

Tell me about Linux internals and the Linux kernel.

What is a heap and a stack?

What is the difference between a list and a tuple in Python?

What is a zombie process and how do you deal with it?

What are interrupt latency, race conditions, and context switches?

Where do you see yourself in five years?