Vibe codingHardvc-g004

Subject Ai decomposition delegationLevel Senior–Staff~22 minCommon in Algorithms & data structures interviewsIndustries Software development, Technology

Question

You must split a `users` table's monolithic `full_name` column into `first_name`/`last_name` across a live, high-traffic Postgres database with zero downtime. How do you decompose this for an AI agent — which steps do you delegate, which do you keep and gate behind human checkpoints, and why?

What a strong answer looks like

Treat the AI’s output as a draft to verify, not an answer to trust. Name the specific flaw and the input that triggers it, say how you’d catch it — tests, edge cases, reading critically — and how you’d re-prompt or decompose to get it right.

Learn the concepts

Describe your solution

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.