Let me see if I can understand the question. You are asking, " Are questions that are asked on HubPages given attention and ranking under the Q&A?"
The answer to that question is no. There isn't any ranking given on Q&A; however answering questions, creating hubs, commenting on hubs and getting involved with the community assists with your overall HP score.
Next question. " Which topics receive the most page views on HP? How-To's, Holiday and Celebration along with recipes can rank high with page viewing. But it is also based on what people are looking for on the Internet. Google is the based place to track your traffic daily or traffic Travis.