If the task was "write me a basic function that adds two numbers" then sure, editor doesn't matter, anyone with basic understanding of the language must absolut

If the task was "write me a basic function that adds two numbers" then sure, editor doesn't matter, anyone with basic understanding of the language must absolutely be able to do that without google. But that's not the task they use for interviews. It's gonna be something like one special scenario of an abstract academic problem that you will never encounter in a high traffic website project. You either shouldn't need to code it and the thought process should be enough for the purpose of the interview, or you need to think and focus really hard, and being constantly distracted by an editor that doesn't do what you expected, because you have a muscle memory for your own keyboard shortcuts totally ruins that. The result is that your performance in this task has nothing in common with your performance in the job.