Yeah - those are good; I've asked variants of those and others when I've interviewed. It's interesting; you sometimes get these incredulous looks (may be a red flag), other times they look surprised but launch into describing their process, failures, places to improve, etc. Sometimes this discussion can also be a means for me as a candidate to decide if I want to work there (ie - is it a broken environment where I might become the fall guy or it will cause me heartache in the long term). Sometimes it leads to more interesting tech discussion and such.