The Ridge Physical Product Development Project Manager interview questions

Two zoom interviews. Just a general interview but had some discrepancies in what the two interviewees wanted for the position. So the first seemed mainly useless. Was also asked if I was familiar with Slack and I said no. The position at the time mentioned that Slack knowledge was desired but not necessary but it was then posted again mentioning Slack knowledge was necessary. Don't want to make any assumptions but that just stood out to me. The company itself has 432 open positions on Linkedin which is a bit suspicious as the goal of the company is to eventually get acquired for $1 billion from what I've seen online.