ByteDance Software Engineer interview experience

The total session lasted about an hour, and the timing was pretty specific: roughly the first twenty minutes were self-introduction and talking through my work and projects, then we got into questions tied to those projects and some system design trade-offs. The remaining forty minutes were mostly coding.

The coding problem I worked on involved reversing a linked list in groups of K nodes. I implemented it iteratively using a dummy head node to make pointer manipulation cleaner, while keeping the space complexity at O(1). When I was done, the interviewer followed up with edge cases and also