Anthropic Programming Interview Questions
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Design Check-In System
Toggle employees in and out of the office on a strictly increasing timeline
Design File Management System
Design an in-memory file management system: CRUD and ID management.
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> 2026 > Anthropic > Coding
Function Call LRU Cache
Wrap any function in a LRU cache. Turn function arguments into a hashable key so repeated calls skip recomputation. Then survive process restarts — every cache hit and miss appends records to an append-only log, and restore replays the log to recover both values and LRU recency order.
Levels
- 1.Memoization - return cached results on repeated function calls and refresh recency
- 2.Disk persistence - replay an append-only log and tolerate a truncated final record
- 3.and more...
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Model Distribution System
File Dedup