Cloud Storage Systems

Question

# Cloud Storage System (Online Assessment) **Company:** Anthropic **Category:** Coding / Online Assessment **Role:** Software Engineer **Frequency:** High --- ## Problem Statement Design and implement an in-memory cloud storage system that supports file operations with progressively advanced features across four levels. --- ## Requirements ### Level 1 — Basic File Operations - `ADD_FILE ` — Add a file at the given path with the given size. Return `"true"` if successful; `"false"` if a file already exists at that path. - `GET_FILE_SIZE ` — Return the size of the file, or `""` if it doesn't exist. - `DELETE_FILE ` — Delete the file. Return the file size if it existed; `""` otherwise. - `COPY_FILE ` — Copy source to target. Return `"true"` if successful, `"false"` if source doesn't exist or target already exists. ### Level 2 — Search and Listing - `GET_N_LARGEST ` — Return the `n` largest files whose path starts with `prefix`, sorted by size descending; ties broken by path lexicographically ascending. Format: `file_path(size)`, comma-separated. ### Level 3 — User Capacity Limits - Add

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