The overall process was quite smooth and professional, especially the recruiter; he is a really nice guy.

I applied online and, one week later, got a phone screen from the hiring manager.

Then, there was a round of phone interview from a team member.

One week later, I was invited for the onsite interview.

The onsite interview was pretty standard: three rounds of technical interviews and lunch with the team.

Three weeks after the onsite interview, I was told I was not a good fit.

The overall process was quite good.

Difference between a pointer and a reference?

Difference between std::map and std::unordered_map. What happens if many objects have the same hashing values?

Convolutional operation on the whiteboard. How to parallelize this?

Typical OOP design problem.