Two cents

1. You did not answer the technical questions well, you think you are right, but it was not the answer. I was tested a c++ coding, I used the pointer, I thought I was right make this code running, but I forgot using the Volatile key word. So I was still think it was good, but failed. Other behavior interview really went well.

2. It is the CHEMISTRY. Some time Americans just show their nice character, they did not appear on their face. Think about your talking with the Hiring manager.

Good luck!