EY Business Analyst interview questions

Everything went well till the interview was conducted.. regular calls from the HR, timely schedule of interviews etc. But once the offer was released the HR just vanished. I just wanted to change my joining date but she wouldn't pick any of my calls and wouldn't even reply to multiple emails I had sent. Extremely unprofessional behaviour from such a big company.

Relatively easy. People were extremely nice, and the interview was conducted online. One of the rounds was a group case interview, and you had to solve a case with other candidates in front of professionals and consultants. Case was tricky, but the goal is to see you wok in a team