Not always, but it you're a senior dev and get frustrated by the same question over and over again, it could be that you're not enforcing the idea of the junior dev having a notebook or whatever to write down the answer.
I get hella frustrated with anyone in a meeting or whatever that doesn't bring to the table a way of recording info. If I get asked a second time about a thing that could have been written down the first time, I get frustrated.
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