Tesla Sr. Software Engineer interview questions

Initial phone screen and then onsite interview with panel of 4 one after the other. Initial focus is on recent projects and made comfortable. Then each Engineer in the team focusing on different areas of technology stack. Office work place looks ok and everyone is busy all over.

good 4 hours interview at tesla onsite all are really experienced employees. very fast paced company. technically good background they have. reached there by 2 pm. came out by 6pm. expected the offer. but in last minute I came to know that not going to release for me. no idea. why it is not.