+4Anthropic 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 Oct 2026
#oop
- +4
Shopping cart with discounts, undo and redoCodingBuild a shopping cart with item discounts where every mutation supports undo and redo. Reported on 1point3acres' Decagon bank; reconstructed in our own words.Last asked Sep 2026- Recipe shopping cart with bulk discountsCodingModel a recipe shopping cart that prices ingredients with bulk discounts per ingredient. Reported on 1point3acres' Decagon bank; reconstructed in our own words.Last asked Jul 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
Todo list system design in codeCodingDesign and implement a small todo list system with lists, tasks and completion state. Reported on 1point3acres' Notion bank; reconstructed in our own words.Last asked Jun 2026
Ultimate tic-tac-toeCodingImplement ultimate tic-tac-toe: a 3x3 grid of 3x3 boards where each move directs the opponent to a specific sub-board, with meta-board win detection. Reported on 1point3acres'…Last asked May 2026- Page permission managementCodingImplement page-level permissions: grant and revoke access for users on pages, and answer whether a user can view or edit a page, respecting the page hierarchy. Reported on…
- Nested todo list with subtasksCodingModel a todo list whose items can nest subtasks to any depth: add, complete and list tasks while keeping the hierarchy. Reported on 1point3acres' Notion bank; reconstructed in our…