DatologyAI Software Engineer Interview Experience — 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.

Part 2: Introduce a cursor. Add and delete characters at the cursor's position, and allow the cursor to move left and right.

Part 3: Introduce new lines. Allow the cursor to move up and down, and add or delete characters at the cursor's position.