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Practice system design interviews out loud with an AI interviewer, a shared whiteboard and a scorecard for your level.

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8 questions

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Practical engineeringHard
In-Memory Key-Value Store with Crash Recovery from a Log and Concurrent Access
Companies: OpenAI
Concurrency · Key-Value Stores
Last reported Sep 2026
Open workspace
Practical engineeringMedium
Implement a Recoverable In-Memory Key-Value Store
Companies: OpenAI
Database Internals · Key-Value Stores
Last reported Jun 2026
Open workspace
CodingHard
Implement Persistent KV Store Serialization
Companies: OpenAI
Database Internals · Key-Value Stores
Last reported Apr 2026

Interview questions by company and topic | SysRound

CodingMedium

Build a File-Backed Key-Value Store

Companies: OpenAI

File & Media Storage · Key-Value Stores

Last reported Apr 2026

CodingHard

Implement a persistent sharded key-value store

Companies: OpenAI

Key-Value Stores

Last reported Nov 2025

System designHard

Design a scalable service and model performance

Companies: Anthropic

Consistency & Availability · Key-Value Stores · System Design

Last reported Aug 2025

System designHard

Design an in-memory database

Companies: OpenAI

Database Internals · Key-Value Stores · System Design

Last reported Aug 2025

System designHard

Design an in-memory key-value database

Companies: OpenAI

Consensus & Replication · Key-Value Stores · System Design

Last reported Jul 2025