The interview question that best exemplifies what Neil wrote is, "Did you write it yourself, or as part of a team?"
Both answers are wrong, depending on the interviewer.
If you say "yourself", you're admitting you're a lone wolf. If you say "team", then you were along for the ride, even if only two people were on the team.
I mean a candidate should be able to distinguish their contribution to a project in some more fine grained way than this. If they come from freelance and say "I wrote the code on my own" that's fine but maybe you could mention how you communicated with the client to establish requirements and milestones and get to a successful delivery.
If you worked in a team you should be even more able to explain your individual contribution & the context in which you worked.
This is not a trick question. A good answer is "I did x, y, and z tasks, which required a, b, and c interactions with the world around me to make sure I was doing the right work and meeting expectations".
I once failed this question at a FAANG company. We were talking about a recent project that my company did with Pivotal. So like every project Pivotal does, we spent about one day a week dividing up the upcoming work into tiny pieces, then we spent the other four days pair programming by doing whatever the top task on the backlog was. Predictibly, on a team that had 3 pairs, this means I or my pair did about 1/3 of all things, distributed somewhat uniformly throughout the project.
"What parts are you solely responsible for?" 0 things, the same as everyone else who worked on this project! Wrong answer though.
But that's the best part! You can describe the truth and the way you would have liked it to have gone and the employer will self-select themselves out if they're not the kind of culture you desire. It's like they're doing the work for you so you don't end up at a job at a place you don't like!
Both answers are wrong, depending on the interviewer.
If you say "yourself", you're admitting you're a lone wolf. If you say "team", then you were along for the ride, even if only two people were on the team.