There was an onsite interview that lasted an hour with the team manager and another engineer. The interview went well, and I answered most networking questions. I was honest about what I knew, but they expected a candidate with strong Python skills, which I didn't have. I was open about this from the start, from the moment the recruiter contacted me. They mentioned this as the only reason for rejection.

I felt that if they didn't want a candidate without Python knowledge (I had not even mentioned Python on my resume, so I was very clear from my end), they needn't have called me to meet in the first place.

I felt this was not a good experience.

Mostly about TCP, networking fundamentals.