There were 3 rounds. All of them were easy. No need to worry much, learn Java and Sql. Most of the technical questions were based on Java and Sql. And at last therre was a managerial round.
I applied through a recruiter. The process took 2 weeks. I interviewed at Oracle (Madrid) in Jul 2022
Interview
1. Telephone call to get to know each other
2. Group dynamic with all the candidates
3. Interview with managers of your prospective teams you could join if you passed the interview
Lengthy with no real structure it was hard to gauge interest of employees who work for them especially when asking about company culture. 4 rounds of interviews that led to bring ghosted by the recruiter and only got an answer after chasing after them.