Cracking a system design interview isn’t just about knowing buzzwords.
Here are the key components every engineer should master:
✅ Load Balancer
✅ API Gateway
✅ Caching
✅ Database (SQL/NoSQL, Sharding, Replication)
✅ Message Queues
✅ CDN

These aren’t just terms — they’re the building blocks of scalable systems.
Master these and you’re already ahead of 80% of candidates.

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