Fullstack Labs interview questions

The first interview was with one person and it was pretty chill. He asked about my previous experience and things like that. After that, they send you 3 challenges that must be completed in order, but not necessarily one right after the other (you can do one per day, for example). The first one was a logic and basic math test with 40 questions to answer in 20 minutes, plus 10 behavioral profile questions. The second stage is on a platform called Hiroflix. I found this one more difficult. It includes questions about your experience as well as technical questions like: “What is the difference between Exception, RuntimeException, and Error?” and “What is the difference between abstraction and interface?” They expect very detailed answers. I got rejected at this stage because my English wasn’t good enough for me to answer properly. I’m from Brazil. The last stage is a technical challenge. I even downloaded everything to set up my computer for it, but since I received the rejection email from the previous stage, I ended up dropping it. Still, it seemed pretty straightforward: implementing CRUD operations (getAll, delete), unit tests, and one method with business rules provided by them. There were also a few tricky setup issues to get the project running, which is apparently part of the challenge itself. Since I didn’t actually start the challenge — I only downloaded it and ran it locally — I can’t really say how it is after that.