1. Tell me a suggestion you have made that was implemented in this ethics field?
>>It's important here to focus on the word "implemented." There's nothing wrong with having a thousand great ideas, but if the only place they live is on your notepad what's the point? Better still, you need a good ending. If your previous company took your advice and ended up going bankrupt, that's not such a great example either. Be prepared with a story about an idea of yours that was taken from idea to implementation, and considered successful.
2. What experience do you have in this ethics field?
>>Hopefully if you're applying for this position you have bags of related experience, and if that's the case you should mention it all. But if you're switching careers or trying something a little different, your experience may initially not look like it's matching up. That's when you need a little honest creativity to match the experiences required with the ones you have. People skills are people skills after all, you just need to show how customer service skills can apply to internal management positions, and so on.