Ask HN: How to prepare for Stats,A/B Testing questions for data-sci interview?

Hello HN, I have looked at a few posts related to data-science prep posted on HN. While I could find a lot of resources aimed at getting up to the mark with data-structures/algo questions, I am still looking for ways to study Statistics, A/B Testing, and Metrics questions.

I have a background in Computer Engineering and I am currently working in Data-Science for the past 3-4 years. I am looking for resources(or a plan) to go from knowing beginner level statistics to gaining intermediate/advanced level expertise in it so I could answer data-science Statistics interview questions better. The same goes for A/B Testing and metrics questions. Any kind of opinion and suggestion would be valuable in this regard.

I would also love to hear your experience of preparing and giving data-science interviews and the things/resources that helped you a lot in preparation, especially for FAANG companies.