Power Grid Dispatch / Smart Device Command System Design

System DesignOpenAILast reported August 2026Low Frequency
Reported
3× across candidate reports
First seen
August 2026
Last reported
August 2026
Reported outcome
mixed

Problem Overview

Design a power grid dispatch center that issues targeted directives to heterogeneous smart devices across geographic regions. Example directive: 'All air conditioners in the northeast region, reduce power consumption by 20%.' The system must handle: (1) Device heterogeneity — devices include EVs, refrigerators, ACs, hospitals (with different priority levels and…

  • 3 candidate-reported follow-ups — 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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