Topological Sort of Task Dependencies

Phone ScreenCitadelLast reported August 2026Low Frequency
Reported
3× across candidate reports
First seen
April 2025
Last reported
August 2026
Reported outcome
mixed

Problem Overview

Given a map tasks where each key is a task name and its value is the list of tasks it depends on, return any valid order of the tasks: every task must come after all of its dependencies. The report describes it as almost the same as LeetCode Course Schedule,…

  • 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.
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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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