Morgan Stanley C++ Software Developer interview questions

First round is a 30~45 mins phone interview. Pretty standard question, self introduction, basic C++ concept, common Linux commands. Second round is one hour HackerRank test and one hour system design question. Each sessions have 2 interviewers. The questions I got for HackerRank test doen't involve too much algorithm, such as string manipulation. I didn't talk much about what my thinking process is and jump right into it, because there's really nothing to talk about. Based on the outcome, I guess they think I don't know how to communicate. For system design it's also built up from a simple question and then emerge into questions like how to ensure high availablity. I've no idea how they can tell if a candidate is good enough by asking these questions. It's really a disappointment that it's more like a hire for new grad because the questions I encounter have nothing to do with my work experience. And it also disapoints me that I don't really get any C++ question.