I was talking with someone who's applying for YC just recently and thought how the questions I was hitting with (many almost verbatim from this list) are essentially a checklist for gut checking most companies. YC interviews seem like a really good place to create a really solid foundation.
It'd be very useful to have at the end of the questions a list of all of them showing the response time and sorted by it. That way you get an idea of which ones took too long or too short and improve them.
Really useful tool. I would also take a look at this article, which has a prioritization of the different questions out there, and therefore which to focus on: https://www.aptible.com/blog/y_combinator.html
In five years, we will have a successful startup called Combinator'd: The Leading Startup Incubators Should Be Applying to Fund You! 10 Minutes Could Get You 10 Term Sheets.
What are you working on?
How does it work?
Someone else just showed us this idea, do you have anything else?
How far along are you?
Who are your users and why are they using this?
What do people do to solve this today and why are you better?
How are you going to get demand?
What are your backgrounds?
How did your team meet?
How big could this business be?
How much could you make in 1 year?
What is your biggest objection from users?
Why now?
How did you start working on this idea?
Do you have any domain expertise?
Why are you the right team?
What are the economics of the business?
When do you become ramen profitable?
How will you achieve a monopoly?
If I gave you 120k right now, what would you spend it on?
What is the equity split? If uneven, tell me why.
Where will you be by the end of YC?
If you fail, what will the reason be?
What is your burn rate?
Why aren't you growing faster?
Who are you most afraid of?
What is your CAC and LTV?
What is your biggest weakness as a team?
Why aren't you hiring to fill that weakness now?
6 months from now, what will be your biggest problem?
What has the feedback been from users so far?