The recruiter initially appeared annoyed and brought her frustration into the interview. She made disapproving facial expressions about everything she didn't like, and her questions were unclear. She did not seem to understand the difference between automating a website and automating mobile apps; she mixed up the questions. When she gave me exercises, I solved them remarkably, but she only focused on irrelevant aspects, trying to make me fail in order to have a reason not to hire me. Overall, it was an extremely poor experience with an unqualified individual.

What are the principles of object-oriented programming?