Design REST APIs for JSON file storage

Q: Design REST APIs for JSON file storage

This is a System Design interview question from Microsoft for Software Engineer roles. View the full question and solution on PracHub.

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Question

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Scenario

Design a service that stores JSON files/documents and exposes a RESTful API for clients.

Requirements

Clients can upload , download , list , and delete JSON files.
Each file has metadata: owner/tenant , fileId , createdAt , updatedAt , size , and optional tags.
Handle concurrency (simultaneous updates) and provide a way to avoid lost updates.
Include authentication/authorization.
Scale to many files and large aggregate storage.

Nice-to-haves (state your assumptions)

Versioning (keep old versions)
Partial updates (PATCH)
Search by metadata/tags
Rate limiting and quotas
Large file handling (multipart upload)

Design REST APIs for JSON file storage

Scenario

Requirements

Nice-to-haves (state your assumptions)

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