Restaurant Waitlist and Table Assignment (OOD)

System DesignAmazonLast reported September 2026Low Frequency
Reported
3× across candidate reports
First seen
December 2025
Last reported
September 2026
Reported outcome
unknown

Problem Overview

Design a restaurant waitlist and table assignment, as an OOD exercise you implement in code. Requirements from one phone-screen report: - Waiting parties are first in, first out, but if an 8-person table frees up it goes to an 8-person party first, even if a 2-person party is ahead of…

  • 1 candidate-reported follow-up — the exact probes interviewers asked, with the trigger for each
  • The rest of the problem statement — full requirements, constraints, and edge cases
  • Approach and trade-offs — what passing candidates did, and the mistakes that sink people
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Verified Source
Every question is reconstructed from multiple independent candidate reports. Verbatim follow-ups, not invented ones.
Codex Fact-Checked
Technical claims, formulas, and scale numbers are reviewed against primary sources.
Interviewer Follow-ups
The exact follow-ups reported by candidates, with the trigger that prompts each one — plus the mistakes that sink people.
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