Virtusa Senior Java Developer interview questions

There were 3 rounds of interview in virtusa. Technical round, client round and service line interview. Interview process was lengthy and time consuming. It was focused on core Java, springboot and microservices. Some questions were from database also.

My cv got selected and I received a call from Hr to come for walk-in and they clearly mention that all rounds will happen on the same day and on Monday you will receive offer,if you got selected. They make us wait for 3 hr for first round and then 1st was AI based java,springboot interview. And then second round was again technical but on their office laptop via teams. After that 1 hr round and hr told as its now 8 pm in night,he will give a call back on monday to discuss further but after that they just ghosted me