A Three-Part Text Editor

DatologyAI is a startup that raised a Series A two years ago and still has not raised a Series B. I went into the interview completely unprepared. The problem was a text editor, and only when I was writing this report did I realize that it seemed to be a question the company asks often. There were three parts. Part 1: Implement adding characters and deleting characters, and print all characters.…

Shared by a candidate · reported Sep 2026. Interview formats change; use it as a guide, not a script.