What are the operational constraints? Focus on High Availability, Scalability, Fault Tolerance, and Latency targets.
What features are we building? (e.g., "Can users upload videos, or just watch them?")
Step 4: Wrap Up and Identify Future Improvements (3–5 minutes) system design interview alex wu pdf github
The System Design Interview (SDI) is a critical hurdle for software engineers aiming for mid-level, senior, or staff roles. Unlike coding interviews with concrete "right" answers, system design discussions are open-ended, ambiguous, and require a blend of architectural knowledge and communication skills.
: Discuss bottlenecks, potential improvements, and trade-offs. Key Case Studies Included What are the operational constraints
Managing replication and tunability (CAP theorem).
Preparing for system design interviews is essential for several reasons: "Can users upload videos
Be explicit: “I’ll design upload + storage, and feed generation. I’ll assume auth and search are out of scope.”