"Random questions" doesn't mean questions without any thought put into them. It just means anything helpful from workflow or environment related questions to code style or processes that are not documented or easy to find. vs. wasting time trying to find things that don't exist or reinventing the wheel, which is more tempting to do when you can't see what your coworkers are doing and don't want to risk offending people who have no interest in passing on knowledge, like a sibling of your comment.