Terrible hiring process. I don’t recommend anyone to do a case for them. They don’t take the time to have an online meeting with you and instead just send a case to measure your skills.
When you accept the case, here’s what happens:
They send you a large case and expect it to be completed in a very short time. After the case is completed, they reject you with no explanation. Even when you send an email asking what the weak points were and how you could improve, you get no response.