I got my nexus interview on December 18 and was approved on the spot.
however, I’m still waiting for the card.
as for the questions they asked me. They went through my application to confirm my identity, my address, employment, places I have traveled to in the past 5 years, and why I wanted to get nexus. They in turn explained to me the rules of the nexus program. i was first interviewed by a US CBP officer before being interviewed by a CBSA officer. The interview took about 15-20. They told me right on the spot that I was approved. Few minutes later, I checked my TTP acc and noticed the noticed the status changed from conditionally approved to approved. But after 3 weeks, I still haven’t received my nexus card. Yesterday I phoned the enrolment center where I had my interview, I was told it sometimes up 8 weeks to get the card.
Hope this helps.