[delinka]

>To debug the traversal algorithm when it breaks in production?

And what's the likelihood of that happening with a well-used framework? Maybe the interviewer wants to see my ability to debug problems - great let's do that instead. You want to see how I work? OK, let's pair on something. Pinning this to "implement BFS at the drop of a hat on a whiteboard or in this project" is bullshit.

>Also, if you know that all the companies do this, why don’t you just study before hand?

Fine. I'll implement a few solutions to the problem in the languages I'm familiar with and put it on GitHub. Now the interviewer can check it out and we don't have to waste time at a whiteboard.

[throwawaymath]

> what's the likelihood of that happening with a well-used framework?

In my experience, higher than you'd hope.