1. In an average project Lisp would rank fairly high for me. In fact for making meaningful changes in an average quality large code base I'd rank it at the top, my order being (best first):
Lisp, C, Java, C++, Python
It all depends, e.g., C++ would rank higher in a very high quality code base.
It all depends, e.g., C++ would rank higher in a very high quality code base.