Never imagined so many people would be defending 5 rounds of interviews the way they are. Just to be clear: If you’re going to a fifth-round interview and all they’re doing is asking you to solve problems. THEY’RE USING YOU. LEAVE.
You don’t need 3 rounds of interviews to hire someone for an entry-level position. It is a waste of literally everyone’s time. Ask what you want to in the first-round interview, and if you have follow-up questions, in the follow-up interview. ENOUGH.