Implement an in-memory DB with TTL backup/restore

Company: Anthropic

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Take-home Project

Quick Answer: This question evaluates implementation and reasoning skills for an in-memory nested key→field→value store with TTL-based expirations, snapshot backup/restore semantics, and timestamped operations, testing competencies in data structures, state management, and time-aware logic within the Coding & Algorithms domain.