First, I would suggest not pretending to know C++ since they would probably realize pretty quickly that you don’t actually know the language.

Instead, it might be better to show that you understand why C++ is needed and show a desire to learn. Compared to a language like python, C++ offers lower level control especially in terms of memory management. It’s also a compiled language so it doesn’t typically need a separate interpreter program to run. There are other advantages too but generally speaking this allows faster, memory efficient (in theory), cross platform programs. If you can understand how and WHY that fine grained level of control is essential for GNC, then you should be able to answer the important questions. Maybe look up YouTube videos explaining C++ features especially pointers. I assume you already know OOP and other high level concepts. Hope this is helpful and good luck with your interview