Pergunta de entrevista da empresa Adyen

Just basic stuff based on the previous round (Hackerrank) and how the code could have been improved. Answered most of the questions asked and the interview went fairly well. Got ghosted by the HR after that, no feedback, no explanations although I did send a couple of emails to look for an update. Horrible experience, at the very least the candidate deserves to know what went wrong. The questions mainly involved on what design patterns could be applied to Hackerrank problem and what data structure/generic solution would you use if this was a real life problem.