Meet Allison & Tim
Your AI coaches
Practice coding interviews out loud with real-time voice coaching. Your code actually runs.
Start Part 1 to unlock your next challenge
In-Memory SQL Engine
Also known as: In-Memory SQL Engine (Custom)
You're implementing CREATE, INSERT, SELECT, and DELETE from scratch—no shortcuts. Interviewers love it because it exposes whether you can follow a spec precisely without drifting. The trap is getting lost in state management halfway through. Keep your table representation explicit and the rest follows.
Meet Allison & Tim
Your AI coaches
Practice coding interviews out loud with real-time voice coaching. Your code actually runs.
Desktop required to run this problem
StrongYes runs real code + tests in a desktop editor. Mobile is view-only for now, so you can’t start this here. Sorry about that — email yourself a link and pick it up on your computer.
Start Part 1 to unlock your next challenge
Desktop required
Sorry — mobile can’t run the editor + tests yet. Email yourself a link to continue on desktop.