Two that come to mind are trouble sleeping and lack of concentration, plus maybe social withdrawal (at least from most friendships). But still, seems like a stretch; most depression symptoms are pretty unambiguously negative.
I can't recall the details, but it were things like lack of appetite, lack of sleep, unfocused or lack of attention.
I recall the that the questions made sense given the goal of the quiz, but the questions were probably too broad and, which was kinda my point, they lacked control questions to rule out other causes for those effects.
