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642 questions in the library. A source association does not guarantee a future interview question.
Behavioral and leadership · Coding · Machine learning · ML system design · Object-oriented design · Other questions · Practical engineering · Product and business · System design
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Showing 201–225
Companies: OpenAI
Distributed Transactions & Idempotency · Payments & Ledgers · System Design
Last reported Jun 2026
Companies: OpenAI
Last reported Jun 2026
Companies: OpenAI
Last reported Jun 2026
Companies: OpenAI
Distributed Transactions & Idempotency · Payments & Ledgers · System Design
Last reported Jun 2026
Companies: OpenAI
Distributed Transactions & Idempotency · Job Scheduling & Workflows · System Design
Last reported Jun 2026
Companies: OpenAI
Dynamic Programming · Grids & Matrices
Last reported Jun 2026
Build an in-memory database that supports basic SQL-like operations including insert, query with WHERE clauses, and ORDER BY functionality. Implement efficient data storage…
Companies: OpenAI, Anthropic, Two Sigma
Last reported Jun 2026
Design a messaging platform like Slack that supports real-time messaging through direct messages and channels (public/private), message threads, new message indicators, and…
Companies: OpenAI, Coinbase, Databricks
Last reported Jun 2026
Companies: OpenAI
Data Structure Design
Last reported Jun 2026
Companies: OpenAI
Data Structure Design · Memory Management
Last reported Jun 2026
Implement a system to simulate combat between monsters with different attributes and abilities. Design the logic to handle turn-based fighting mechanics and determine the winner.
Companies: OpenAI
Last reported Jun 2026
Companies: OpenAI
Last reported Jun 2026
Given an m×n grid with empty cells, fresh (1) and rotten (2) oranges, compute the minimum minutes until all fresh oranges become rotten as rot…
Companies: OpenAI, Amazon, Anduril, Flipkart +3
Array · Breadth-First Search · Matrix
Last reported Jun 2026
Companies: OpenAI
Data Structure Design · Memory Management
Last reported May 2026
Present and walk through the design of a real system you have previously worked on, explaining your architectural decisions, trade-offs, and how you addressed key…
Companies: OpenAI, Amazon, Microsoft, Oracle +1
Last reported May 2026
Design a Bank class that maintains 1-indexed account balances and supports transfer, deposit, and withdraw operations; each operation must validate account indices and (for…
Companies: OpenAI, Capital One, Coinbase, Okta +1
Last reported May 2026
Companies: OpenAI
Caching · CI/CD & Deployment · System Design
Last reported May 2026
Algorithm trade-offs (fixed window, sliding log, sliding counter, token bucket), placement, distributed atomic counting, failure modes.
Companies: OpenAI, Amazon, Anthropic, Apple +14
api-gateway · atomicity · Concurrency · Consistency & Availability
Last reported May 2026
Companies: OpenAI
Messaging & Event-Driven · Search & Feed Systems · System Design
Last reported May 2026
Companies: OpenAI
Distributed Coordination · Multiplayer Game Systems · System Design
Last reported May 2026
Describe how you presented a project's technical findings and outcomes to stakeholders or your team. How did you tailor your communication to different audiences?
Companies: OpenAI
Last reported May 2026