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A CDN speeds up web applications by caching content closer to users.

Choosing between single and multi-region architecture affects system resilience and cost.

Data residency is crucial for compliance with laws about where data can be stored.

Distributed caching spreads data across multiple servers for better performance and reliability.

Fault domains help prevent multiple servers from failing together in an architecture.

Disaster recovery ensures systems can restore services and data after major disruptions.

Caching helps applications respond faster by serving data from memory instead of hitting the database.

FAANG interviewers evaluate problem understanding, architecture, scalability, and communication skills.

Containers share the host OS kernel, while VMs virtualize hardware with separate OS.

High Availability ensures your application remains operational even during server failures.