Technical Screen

SQL Screen With Doubled Difficulty and Tight Time

DoorDashData Scientist · Technical Screen · Oct 2025

Part 1 was product, and since I was well prepared it felt fine. Prepare a lot more for high-frequency Biker and Cold Food. Read the attached switchback experiment design, randomization, and analysis parts carefully. SQL was not the usual four questions (someone on the forum summarized them before, but the answers weren't quite right, so correct them yourself). I got new questions, and the difficu…

Shared by a candidate · reported Oct 2025. Interview formats change; use it as a guide, not a script.