System design interview question
"Design Amazon. Product catalogue, search, cart, checkout, orders, and fulfilment. Hundreds of millions of products from millions of sellers, hundreds of millions of customers. Start by telling me how you would break this down."
decomposition judgment. The scope is deliberately enormous — far too large for 45 minutes — so the primary signal is whether the candidate scopes it down explicitly and picks the right subsystem to go deep on. A candidate who tries to cover everything produces a shallow box diagram; a candidate who says "here are the six services, and I will go deep on order placement because that is where correctness lives" is doing the job.
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