Business Analyst interview — the case-study questions I actually got asked

Just had a Business Analyst interview and it was almost entirely case-study style — barely any "tell me about yourself" stuff. Writing down what I remember while it's fresh, since I couldn't find much specific to BA roles when I was prepping (everything online is software engineer coding interview stuff).

The questions

• "A food delivery app's average order value has been flat for 6 months while order count keeps growing. How would you investigate this?" — wanted me to separate "investigate the cause" from "propose a fix," and specifically asked what data I'd request first.
• "How would you estimate the number of petrol pumps in Bangalore?" — a straight market-sizing question, wanted me to state assumptions out loud (population, cars per household, average tank fill frequency) rather than just guess a number.
• "We're deciding whether to launch a new feature or fix an existing one that has a lot of complaints. How do you decide?" — no right answer, they wanted a framework (impact vs effort, user segments affected, cost of not doing either) not a gut-feel opinion.
• "Tell me about a time you had to convince someone of something using data." — standard behavioural, but they followed up hard on "what if they still disagreed after you showed the data," which caught me off guard.

What I wish I'd prepared better

I went in with prepared answers to standard questions and got almost none of them. What actually mattered was being comfortable structuring an answer to something I hadn't seen before, out loud, in real time. If you're prepping for BA rounds, practice the structuring itself, not memorized answers to generic questions.

Still waiting to hear back. Has anyone else gotten similar case-study heavy rounds for BA roles? Want to know if this is standard or specific to this company.