I don’t doubt this happens but seems like a poor example. She effectively rooted out a bullshitter. No worries if you don’t know how a tool works, but just say I don’t know. That answer was nonsensical.
For what we know, the guy may well have been employing "test-taking strategies", and he may have been led down the garden path by the interviewer.
There's far too many posts in Rachel's blog where she goes on about "the one", who knows much better already, and here she channels the asshat that she complains about when she encounters him at work.