They are all good advice and common sense if you think about it.
Many candidates make the assumption that they have to provide the most optimized, performant solution to an algorithmic coding question.
I had one exception here, in a FANG company they said I was too slow in solving a problem, I tried to explain my reasoning and other alternatives before the logN solution, like they asked but they were not actually looking for this. The HR said one thing the guy who came to interview had different oppinion, which did not share it.
Overall you have to really dig up what the interviewer really wants from you and give it, not what the policy is.
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They are all good advice and common sense if you think about it.
I had one exception here, in a FANG company they said I was too slow in solving a problem, I tried to explain my reasoning and other alternatives before the logN solution, like they asked but they were not actually looking for this. The HR said one thing the guy who came to interview had different oppinion, which did not share it.
Overall you have to really dig up what the interviewer really wants from you and give it, not what the policy is.