Profiling / Stack Trace Analysis

Also reported as Profiler · Event Profiling

CodingAnthropicLast reported September 2026High Frequency
Reported
42× across candidate reports
First seen
February 2025
Last reported
September 2026
Also asked in
Phone Screen, Behavioral
Reported outcome
mixed

Problem Overview

Anthropic coding question, reconstructed from 42 candidate reports (February 2025 to September 2026). Tests: parsing structured text; stacks. Candidates reported 5 follow-ups. The write-up includes a Python solution that passes 7 test cases.

  • 5 candidate-reported follow-ups — the probes candidates report being asked, with the trigger for each
  • The full 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. Follow-ups candidates reported, not invented ones.
Codex Fact-Checked
Technical claims, formulas, and scale numbers are reviewed against primary sources.
Interviewer Follow-ups
The follow-ups candidates reported, with the trigger that prompts each one — plus the mistakes that sink people.
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