Temporal Key-Value Store with Restore

CodingPerplexityLast reported February 2026Low Frequency
Reported
1× across candidate reports
First seen
February 2026
Last reported
February 2026
Also asked in
OA
Reported outcome
unknown

Problem Overview

The round is a two-part CoderPad take-home, graded by hidden tests that are more comprehensive than the visible ones. Only src/temporal_kv_store.py is graded, and Part 1 is graded on speed as well as correctness. The one reported candidate spent too long on Part 1 and never reached Part 2. Implement…

  • 4 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.
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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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