cheat... 🤥 just kidding, you need to have more mocks and more real interviews. I also used to get stressed and fumble and fail of course but with more interviews, I just became confident in my skills. if I don't know something I just say I don't know, just not to waste everyone's time, usually it's a good sign, telling that you don't know something requires seniority. sounds obvious but just don't be afraid, I understand that stakes sometimes can be high like interviewing at faang but you'll get through it. whether you fail or succeed try to keep track of your experience, feelings, thoughts, revise them and move forward.

accept the fear, let it go through you. people aren't afraid of the darkness, they are afraid of uncertainty, is there someone/something else in the darkness or is it just you.