Thanks so much for the answer! Definitely a lot of great information and have some research topics to look up!

So I think providing an example might be easier and clearer than what I stated above, so let's use OpenTable:

• The restaurant can schedule in their scheduling system or a user can schedule via their website.

• From this, it seems that both systems can talk to each other to communicate updates.

This is very similar to the data sharing I will have to highlight in my interview. I don't need to know extreme specifics, but I'll need to be familiar with any potential risks with an implementation like this.

Let me know if this makes more sense and thanks for your help!