File Deduplication

Problem Overview

The round is one coded problem followed by a long chain of spoken follow-ups, and it is Anthropic's most-reported phone screen by a wide margin, with more than fifty reports. There is no starter code and no interface: you write the function shape, create the test files yourself in the…

• 9 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