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Vibe codingHardvc-g517
Subject Ai code reviewLevel Senior–Staff~19 minCommon in Networking & APIs interviewsIndustries Software development, Technology

Question

An AI wrote this EventBridge-triggered Lambda (Go) that applies inventory deltas. Stock counts drift over time under high event volume. The arithmetic looks right. What's the underlying serverless issue?

go
func Handle(ctx context.Context, ev InventoryEvent) error {    item, err := db.Get(ctx, ev.SKU)    if err != nil {        return err    }    item.Count += ev.Delta    return db.Put(ctx, ev.SKU, item) // overwrite}
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.