Your question is A/B Testing Methods. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
What statistical methods do you commonly use for A/B testing, and why?
Answer as you would in an interview. Focus on the methods you use, when you choose each one, and the assumptions behind them. If helpful, mention how you handle binary conversion metrics, continuous metrics, and sequential monitoring.