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Code RoomOrder history timeout
MediumPrep Room Coding #4401

Order history timeout

Vibe & agenticAlgorithms & data structuresMid–Senior~16 min

An AI assistant generated this Django REST view to render an order-history page. It works in dev with a handful of seeded orders, but the staging team reports the endpoint times out under a customer with 800 orders. Identify the problem and how you'd catch it.

Implement
count_order_page_queries(order_count: int, related_fields_per_order: int, use_select_related: bool) → int
Examples
in[800,3,false]out2401
in[800,3,true]out1
in[3,3,false]out10
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.

0:00 of about 16 min

Vibe & agentic: describe the solution in plain language (or narrate it) and the coach grades your approach.

Which questions mattered is sealed until you submit. Telling you now would just be handing over the edge cases.