Those questions as phrased my end with an escort out the door.

You don't ask for negatives, EVER, and those questions, if answered would likely get the person fired.

You ask about challenges, not negatives such as....


 - What are some challenges do you face as a developer
 - How long have the developers worked here, on average
 - How long has the most senior member of the team been working here
 - What do you like most about working here

Then watch what they DON'T say.