eBay Sr. Product Manager interview questions

What is the challenge when changing for the support personnel the system they are working with?

Case study on what's up new feature based on feedback from users, that complain that messages that were sent to wrong group or wrong message cannot fix the wrong sending. Write the need, how will you understand what is the right feature, user stories, mvp - minimal valuable product, metrics to measure the feature success, how to test it and what to test