I had very similar intervies at Palantir and Yelp, albeit Yelp was understandably just a quick phone screen with a recruiter. However, the "trivia" interview at Palantir came from a forward deployed engineer on the DC based team I was interested in working with and one of my last hour long, onsite interviews of the day. Seemed like a big red flag at the time.
No, at the time Palantir was mine and a lot of other people's too choice at Berkeley. They spent a ton of money on recruiting my class and I went there for dinner/lunch several times.
