Anthropic OA: leveled in-memory record storeCodingA timed, multi-level exercise building an in-memory store of records with fields: create and read first, then scans and filters, then timestamps with expiry, then backup and…
Last asked Jul 2026
Anthropic CodeSignal assessment interview
Round 2 of 8 · 7 questions reported
- Length
- 90 min
- Format
- Timed CodeSignal project in levels; the tests of one level must pass before the next one opens
- They grade
- How fast you build and then refactor while the earlier levels keep passing
- AI use
- No AI unless the instructions for the task allow it
- Heads-up
- Not every candidate gets it (referrals sometimes skip it). The score alone does not decide whether you move on.
Questions Anthropic asks in this round 7
- Recipe manager with ingredient searchCodingBuild an in-memory recipe book. Each recipe has a name, an ordered list of ingredients and an ordered list of steps. The work comes in two parts; finish part 1 before you start…Last asked Jun 2026
- Bank ledger with two-step transfers and mergesCodingModel simple bank accounts with deposits and withdrawals, a transfer flow that holds funds until the recipient accepts, and an account-merge step that must keep working even if a…Last asked Jun 2026
- Task manager with TTL expiry and time-travel snapshotsCodingA four-level task manager: per-user task lists first, then TTL-based auto-deletion, then a snapshot read that returns a user's tasks as they stood at any past timestamp. - Level…Last asked Aug 2026
- Shift grants with promotions that start next entryCodingTrack workers clocking in and out, apply promotions starting from the next office entry, and total granted bonuses across overlapping work sessions. - Level 1: addworker(id…Last asked Jul 2026
- Simplified filesystem with paths and traversalCodingImplement a small filesystem with path lookup and directory traversal, extended in the final level with model-related behavior. The harness is strict, so edge cases around paths…Last asked May 2026
- Stepwise DNS resolver with aliasingCodingBuild a simplified DNS resolver step by step against a fixed test harness: basic name lookup first, then alias layers on top. Later steps assume the earlier ones work. - Level 1:…Last asked May 2026