Revolut Software Engineer New Grad interview questions

The recruitment process looks like this: OA -> HR interview -> 2 tech interviews -> 1 interview with the manager -> you receive the offer. The process started with an OA, which had 2 coding challenges, theoretical questions and a DB problem(to write a SQL query). If you get a good score, you receive in a few minutes an invitation for the HR interview. This interview is really short, max 30 min, and you discuss with the recruiter the details of the position. After that, you receive an invitation for the first tech interview. In this interview, you will have to code the solution of a problem. The second interview has both theoretical question + code. Also, they are using Java, so it would be better for you to be familiar with this language.