I think this is more a test of honesty. It’s one thing to openly use web search as a tool and another to pretend you know something when you don’t. It’s usual

I think this is more a test of honesty. It’s one thing to openly use web search as a tool and another to pretend you know something when you don’t. It’s usually fine to say “I don’t know, I’d have to look that up”. That’s what you’d actually want on the job, honesty and professionalism. People make mistakes all the time. What you want is a culture where they can admit those mistakes so that the team can engineer them away from happening again. If a candidate is willing to lie over something so small as looking up an algorithm then that would be a big red flag to me.