Your questions 1 to 4 look pretty normal and I would ask those as well. The parent poster is mostly talking about people asking questions just to make themselves look better.
It can be a matter of interpretation. Suppose two "highly competent" programmers A1 and A2 and two "moderately competent" programmers B1 and B2 are together.
If A1 asks those questions to B1, I suspect that A2 would view them as perfectly normal, appropriate and helpful, while B2 might view them as aggressive or "trying to show A1's superiority".
Perhaps, depending on B2's self-confidence. There's still that category of people that ask questions for other reasons than being interested in the answers to those questions.
If A1 asks those questions to B1, I suspect that A2 would view them as perfectly normal, appropriate and helpful, while B2 might view them as aggressive or "trying to show A1's superiority".