Not really in a bolt tightenning domain, but I have done technical interviews for a lot of devs including junior ones, and them asking all those questions about the task is something I would consider a very good thing.
At least in my domain the first step of doing a good job is figuring out exactly what needs to be done and in what conditions, so somebody who claims to have some experience who when faced with a somewhat open ended question like this just jumps into the How without first trying to figure out the details of the What is actually a bad sign (or they might just be nervous, so this by itself is not an absolute pass or fail thing).