Clarify and Design Social-Graph Milestones
Last updated: July 17, 2026
Quick Overview
This question asks the candidate to clarify and design milestones for a social graph system, focusing on its core functionalities and interactions.
OpenAI
July 17, 202627
0
193 solved
This question asks the candidate to clarify and design milestones for a social graph system, focusing on its core functionalities and interactions.
This question is typically asked during the onsite interview round for software engineering roles at OpenAI to assess a candidate's ability to design scalable systems. The interviewer is evaluating the candidate's understanding of social graph concepts, their ability to break down complex problems, and their approach to system design, including trade-offs and potential challenges.
What the Interviewer Expects
- Clearly define the requirements and functionalities of the social graph system.
- Outline the high-level architecture and components involved in the design.
- Discuss potential trade-offs and scaling strategies for the system.
- Identify key milestones for development and deployment.
- Address potential challenges and how to mitigate them.
Key Topics to Cover
How to Approach This
- Apply SOLID principles. Single Responsibility makes code testable, Open/Closed makes it extensible.
- Choose data structures based on access patterns, not familiarity.
- Prefer immutable data and message passing over shared mutable state for concurrency.
- Design APIs with RESTful conventions, versioning, meaningful errors, and pagination from day one.
Possible Follow-up Questions
- How would you handle data consistency in the social graph?
- What metrics would you use to measure the success of the social graph?
- Can you explain how you would implement the recommendation feature?
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Practice System Design ProblemsSample Answer
Requirements
To design a social graph system, we first need to clarify the requirements. The core functionalities include:
- User Management: Ability to create, update, and delete user profiles.
- **Follow M...
High-Level Design
The high-level architecture of the social graph system can be broken down into several components:
- User Service: Manages user profiles and relationships.
- Graph Database: Stores user connec...
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