Mastercard Java Lead Developer interview questions

There are 4 rounds, 1st is the technical screening round, followed by 2 technical interviews and one managerial discussion. My experience with the technical screening was below than average. The interviewer did not even care to wear a pair of headphones and since the interviews are all virtually conducted you can only imagine how hard they must be when you are not able to hear the interviewer. Well, they did not even state/ phrase the problem statement correctly. They asked me to do a stack implementation in Java, since the interview exceeded the time box, I just explained the idea and briefly wrote all the abstract methods. Seems that they were not keen on the approach but wanted a ready solution within 2 minutes, which in my opinion did not do justice.