Statusneo Senior Software Engineer interview questions

HR called me, and scheduled a call for wio bank(It has tie up with statusneo) Panel had strict timing: 1 - 2pm, 1 dsa question: Array Medium Level(Then its 2 variants] Java questions: volatile vs synchronised, abstract vs interfaces, indexing and some more LLD question: Design an elevator management system (I was able to give all answers of these questions including DSA with code with best TC). LLD class , i wrote half of the code then time got up, he asked me to find a bug in my own code, I wasnt able to fetch it, last minute was remaining, he left the call, without asking anythign further I got message from HR next day, L1 was not positive, I was able to answer all question with fluency, still That arrogant interviewer didnt think I was right for this, I dont know why