GRAPHISOFT Software Developer interview questions

Informal talk with 3 increasingly senior software engineer guys and a young hr lady, followed by some C++ questions. I got a piece of paper with some textbook C++ code implementing some container classes, and I had to explain what it does, why is it implemented that way, if it is possible to implement in a better way from a "SOLID principles" point of view, etc.

The HR responded very quickly. They scheduled a face-to-face interview right away. The interview itself was good and the hiring manager was friendly. The questions weren't hard, they were curious more about my mindset and the way I'm thinking. They called me back the next day, that they would like to offer me a position.