Identify remaining single points of failure (SPOFs).
Never say a technology is "perfect." Always frame your choices through trade-offs: "I am choosing Database X over Database Y because our feature requires strict consistency over horizontal scaling." To help tailor your preparation strategy, tell me:
No single book can cover everything. To be truly prepared, use a variety of resources:
Strengths of "Hacking the System Design Interview":
The application checks the cache first. If it's a miss, it queries the database and updates the cache manually.