A Text Editor, Then a Mock Spark RDD Where I Blanked on Intersect

Writing down the questions from my DatologyAI interviews back in January at the start of the year. At the time I couldn't find anything about them online 😂 so I'm filling in the gap. Jan 6: The first round was with an interviewer who works on frontend. The question was to implement a text editor: Implement a TextEditor supporting: type_in(char): type a character at the cursor backspace(): delete…

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