It reads like the parent got brought in as an expert in D, not Q, and then got told to work on Q, which wasn't their expectation. You'd be unhappy at that happening to you, right?
My understanding is that people don't find out their assignment until after the hiring. Sounds like the Air Force: dream of flying jets, end up cleaning toilets. At least at Google one can quit.
It's one of the reason why every time a Google recruiter contacts me, the conversation starts with me interrogating them about what exactly they are able to promise, and so far all but one were able to give answers that made it worthwhile to accept an interview.
If Google had been the hottest place in the world to work, and I'd been fresh out of university, then maybe.
