Amazon Web Services Junior Firmware Engineer interview questions

I had only 1 interview online. You are asked to write code that can compile although the interviewer didnt try to write it. I wrote the code and had a problem with it, the interviewer gave me a hint, I wrote a fix. The fix had a different problem, I was told to look for it, I found it. This wasnt enough to pass. I was told there are going to be 3-4 more of this kind of interview if I were to proceed.