When doing interviews in the past, I always had hard times to figure out how could I ask about those things which are important to me. Let’s face it when you are in an interview, and you want to know if you are supposed to work in the weekends or not, it is not always to best way to ask about this directly because you’ll have a chance that the company will lie to you about that. So, for example, you can ask instead ‘How responsive are people to emails/Slack over the weekends and after 6pm?’ and then you might have the chance that you’ll have the answer you are looking for.
I know this because I recently read this in this on a page at keyvalues. There are a few really good questions there, so I recommend to check the page – you never know when you’ll need this.