How to Pass the Product Manager Interview

• It’s important that you understand the product.
• It’s important that you understand the main target audience of the product.
• It’s important that you understand what the competition does.

see also Three ways formally verified code can go wrong in practice

• Did we correctly understand and build what the customer asked for
• Did the customer actually ask for what would solve the problem they are trying to solve

The second one is very important to ask early on, and not asking it can cause a lot of wasted time. When I’m in a position to comment on whether I think someone fits the requirements of a senior developer, whether or not they ask that question plays directly into it.